Chapter 23 Circuits. Chapter Goal: To understand the fundamental physical principles that govern electric circuits. Slide 23-1
|
|
|
- Cecil Pearson
- 5 years ago
- Views:
Transcription
1 Chapter 23 Circuits Chapter Goal: To understand the fundamental physical principles that govern electric circuits. Slide 23-1
2 Chapter 23 Preview Looking Ahead: Analyzing Circuits Practical circuits consist of many elements resistors, batteries, capacitors connected together. You ll learn how to analyze complex circuits by breaking them into simpler pieces. Slide 23-2
3 Chapter 23 Preview Looking Ahead: Series and Parallel Circuits There are two basic ways to connect resistors together and capacitors together: series circuits and parallel circuits. You ll learn why holiday lights are wired in series but headlights are in parallel. Slide 23-3
4 Chapter 23 Preview Looking Ahead Text: p. 727 Slide 23-4
5 Chapter 23 Preview Looking Back: Ohm s Law In Section 22.5 you learned Ohm s law, the relationship between the current through a resistor and the potential difference across it. In this chapter, you ll use Ohm s law when analyzing more complex circuits consisting of multiple resistors and batteries. Slide 23-5
6 Chapter 23 Preview Stop to Think Rank in order, from smallest to largest, the resistances R1 to R4 of the four resistors. Slide 23-6
7 Reading Question 23.1 The symbol shown represents a A. Battery. B. Resistor. C. Capacitor. D. Transistor. Slide 23-7
8 Reading Question 23.1 The symbol shown represents a A. Battery. B. Resistor. C. Capacitor. D. Transistor. Slide 23-8
9 Reading Question 23.2 The bulbs in the circuit below are connected. A. In series B. In parallel Slide 23-9
10 Reading Question 23.2 The bulbs in the circuit below are connected. A. In series B. In parallel Slide 23-10
11 Reading Question 23.3 Which terminal of the battery has a higher potential? A. The top terminal B. The bottom terminal Slide 23-11
12 Reading Question 23.3 Which terminal of the battery has a higher potential? A. The top terminal B. The bottom terminal Slide 23-12
13 Reading Question 23.4 When three resistors are combined in series the total resistance of the combination is A. Greater than any of the individual resistance values. B. Less than any of the individual resistance values. C. The average of the individual resistance values. Slide 23-13
14 Reading Question 23.4 When three resistors are combined in series the total resistance of the combination is A. Greater than any of the individual resistance values. B. Less than any of the individual resistance values. C. The average of the individual resistance values. Slide 23-14
15 Reading Question 23.5 In an RC circuit, what is the name of the quantity represented by the symbol? A. The decay constant B. The characteristic time C. The time constant D. The resistive component E. The Kirchoff Slide 23-15
16 Reading Question 23.5 In an RC circuit, what is the name of the quantity represented by the symbol? A. The decay constant B. The characteristic time C. The time constant D. The resistive component E. The Kirchoff Slide 23-16
17 Section 23.1 Circuit Elements and Diagrams
18 Circuit Elements and Diagrams This is an electric circuit in which a resistor and a capacitor are connected by wires to a battery. To understand the operation of the circuit, we do not need to know whether the wires are bent or straight, or whether the battery is to the right or left of the resistor. The literal picture provides many irrelevant details. Slide 23-18
19 Circuit Elements and Diagrams Rather than drawing a literal picture of circuit to describe or analyze circuits, we use a more abstract picture called a circuit diagram. A circuit diagram is a logical picture of what is connected to what. The actual circuit may look quite different from the circuit diagram, but it will have the same logic and connections. Slide 23-19
20 Circuit Elements and Diagrams Here are the basic symbols used for electric circuit drawings: Slide 23-20
21 Circuit Elements and Diagrams Here are the basic symbols used for electric circuit drawings: Slide 23-21
22 QuickCheck 23.1 Does the bulb light? A. Yes B. No C. I m not sure. Slide 23-22
23 QuickCheck 23.1 Does the bulb light? A. Yes B. No C. I m not sure. Not a complete circuit Slide 23-23
24 Circuit Elements and Diagrams The circuit diagram for the simple circuit is now shown. The battery s emf ℇ, the resistance R, and the capacitance C of the capacitor are written beside the circuit elements. The wires, which in practice may bend and curve, are shown as straight-line connections between the circuit elements. Slide 23-24
25 Section 23.2 Kirchhoff s Law
26 Kirchhoff s Laws Kirchhoff s junction law, as we learned in Chapter 22, states that the total current into a junction must equal the total current leaving the junction. This is a result of charge and current conservation: Slide 23-26
27 Kirchhoff s Laws The gravitational potential energy of an object depends only on its position, not on the path it took to get to that position. The same is true of electric potential energy. If a charged particle moves around a closed loop and returns to its starting point, there is no net change in its electric potential energy: Δu elec = 0. Because V = U elec /q, the net change in the electric potential around any loop or closed path must be zero as well. Slide 23-27
28 Kirchhoff s Laws Slide 23-28
29 Kirchhoff s Laws For any circuit, if we add all of the potential differences around the loop formed by the circuit, the sum must be zero. This result is Kirchhoff s loop law: ΔV i is the potential difference of the ith component of the loop. Slide 23-29
30 Kirchhoff s Laws Text: pp Slide 23-30
31 Kirchhoff s Laws Text: p. 730 Slide 23-31
32 Kirchhoff s Laws ΔV bat can be positive or negative for a battery, but ΔV R for a resistor is always negative because the potential in a resistor decreases along the direction of the current. Because the potential across a resistor always decreases, we often speak of the voltage drop across the resistor. Slide 23-32
33 Kirchhoff s Laws The most basic electric circuit is a single resistor connected to the two terminals of a battery. There are no junctions, so the current is the same in all parts of the circuit. Slide 23-33
34 Kirchhoff s Laws The first three steps of the analysis of the basic circuit using Kirchhoff s Laws: Slide 23-34
35 Kirchhoff s Laws The fourth step in analyzing a circuit is to apply Kirchhoff s loop law: First we must find the values for ΔV bat and ΔV R. Slide 23-35
36 Kirchhoff s Laws The potential increases as we travel through the battery on our clockwise journey around the loop. We enter the negative terminal and exit the positive terminal after having gained potential ℇ. Thus ΔV bat = + ℇ. Slide 23-36
37 Kirchhoff s Laws The magnitude of the potential difference across the resistor is ΔV = IR, but Ohm s law does not tell us whether this should be positive or negative. The potential of a resistor decreases in the direction of the current, which is indicated with + and signs in the figure. Thus, ΔV R = IR. Slide 23-37
38 Kirchhoff s Laws With the values of ΔV bat and ΔV R, we can use Kirchhoff s loop law: We can solve for the current in the circuit: Slide 23-38
39 QuickCheck 23.6 The diagram below shows a segment of a circuit. What is the current in the 200 Ω resistor? A. 0.5 A B. 1.0 A C. 1.5 A D. 2.0 A E. There is not enough information to decide. Slide 23-39
40 QuickCheck 23.6 The diagram below shows a segment of a circuit. What is the current in the 200 Ω resistor? A. 0.5 A B. 1.0 A C. 1.5 A D. 2.0 A E. There is not enough information to decide. Slide 23-40
41 Example Problem There is a current of 1.0 A in the following circuit. What is the resistance of the unknown circuit element? Slide 23-41
42 Section 23.3 Series and Parallel Circuits
43 Series and Parallel Circuits There are two possible ways that you can connect the circuit. Series and parallel circuits have very different properties. We say two bulbs are connected in series if they are connected directly to each other with no junction in between. Slide 23-43
44 QuickCheck 23.4 The circuit shown has a battery, two capacitors, and a resistor. Which of the following circuit diagrams is the best representation of the circuit shown? Slide 23-44
45 QuickCheck 23.4 The circuit shown has a battery, two capacitors, and a resistor. Which of the following circuit diagrams is the best representation of the circuit shown? A Slide 23-45
46 QuickCheck 23.5 Which is the correct circuit diagram for the circuit shown? Slide 23-46
47 QuickCheck 23.5 Which is the correct circuit diagram for the circuit shown? A Slide 23-47
48 Example 23.2 Brightness of bulbs in series FIGURE shows two identical lightbulbs connected in series. Which bulb is brighter: A or B? Or are they equally bright? Slide 23-48
49 Example 23.2 Brightness of bulbs in series (cont.) REASON Current is conserved, and there are no junctions in the circuit. Thus, as FIGURE shows, the current is the same at all points. Slide 23-49
50 Example 23.2 Brightness of bulbs in series (cont.) We learned in SECTION 22.6 that the power dissipated by a resistor is P = I 2 R. If the two bulbs are identical (i.e., the same resistance) and have the same current through them, the power dissipated by each bulb is the same. This means that the brightness of the bulbs must be the same. The voltage across each of the bulbs will be the same as well because V = IR. Slide 23-50
51 Example 23.2 Brightness of bulbs in series (cont.) ASSESS It s perhaps tempting to think that bulb A will be brighter than bulb B, thinking that something is used up before the current gets to bulb B. It is true that energy is being transformed in each bulb, but current must be conserved and so both bulbs dissipate energy at the same rate. We can extend this logic to a special case: If one bulb burns out, and no longer lights, the second bulb will go dark as well. If one bulb can no longer carry a current, neither can the other. Slide 23-51
52 QuickCheck Which bulb is brighter? A. The 60 W bulb. B. The 100 W bulb. C. Their brightnesses are the same. D. There s not enough information to tell. Slide 23-52
53 QuickCheck Which bulb is brighter? A. The 60 W bulb. B. The 100 W bulb. C. Their brightnesses are the same. D. There s not enough information to tell. P = I 2 R and both have the same current. Slide 23-53
54 Series Resistors This figure shows two resistors in series connected to a battery. Because there are no junctions, the current I must be the same in both resistors. Slide 23-54
55 Series Resistors We use Kirchhoff s loop law to look at the potential differences. Slide 23-55
56 Series Resistors The voltage drops across the two resistors, in the direction of the current, are ΔV 1 = IR 1 and ΔV 2 = IR 2. We solve for the current in the circuit: Slide 23-56
57 QuickCheck The battery current I is A. 3 A B. 2 A C. 1 A D. 2/3 A E. 1/2 A Slide 23-57
58 QuickCheck The battery current I is A. 3 A B. 2 A C. 1 A D. 2/3 A E. 1/2 A Slide 23-58
59 QuickCheck 23.9 The diagram below shows a circuit with two batteries and three resistors. What is the potential difference across the 200 Ω resistor? A. 2.0 V B. 3.0 V C. 4.5 V D. 7.5 V E. There is not enough information to decide. Slide 23-59
60 QuickCheck 23.9 The diagram below shows a circuit with two batteries and three resistors. What is the potential difference across the 200 Ω resistor? A. 2.0 V B. 3.0 V C. 4.5 V D. 7.5 V E. There is not enough information to decide. Slide 23-60
61 Series Resistors If we replace two resistors with a single resistor having the value R eq = R 1 + R 2 the total potential difference across this resistor is still ℇ because the potential difference is established by the battery. Slide 23-61
62 Series Resistors The current in the single resistor circuit is: The single resistor is equivalent to the two series resistors in the sense that the circuit s current and potential difference are the same in both cases. If we have N resistors in series, their equivalent resistance is the sum of the N individual resistances: Slide 23-62
63 QuickCheck 23.7 The current through the 3 resistor is A. 9 A B. 6 A C. 5 A D. 3 A E. 1 A Slide 23-63
64 QuickCheck 23.7 The current through the 3 resistor is A. 9 A B. 6 A C. 5 A D. 3 A E. 1 A Slide 23-64
65 Example 23.3 Potential difference of Christmastree minilights A string of Christmas-tree minilights consists of 50 bulbs wired in series. What is the potential difference across each bulb when the string is plugged into a 120 V outlet? Slide 23-65
66 Example 23.3 Potential difference of Christmastree minilights (cont.) PREPARE FIGURE shows the minilight circuit, which has 50 bulbs in series. The current in each of the bulbs is the same because they are in series. Slide 23-66
67 Example 23.3 Potential difference of Christmastree minilights (cont.) SOLVE Applying Kirchhoff s loop law around the circuit, we find Slide 23-67
68 Example 23.3 Potential difference of Christmastree minilights (cont.) The bulbs are all identical and, because the current in the bulbs is the same, all of the bulbs have the same potential difference. The potential difference across a single bulb is thus Slide 23-68
69 Example 23.3 Potential difference of Christmastree minilights (cont.) ASSESS This result seems reasonable. The potential difference is shared by the bulbs in the circuit. Since the potential difference is shared among 50 bulbs, the potential difference across each bulb will be quite small. Slide 23-69
70 Series Resistors We compare two circuits: one with a single lightbulb, and the other with two lightbulbs connected in series. All of the batteries and bulbs are identical. How does the brightness of the bulbs in the different circuits compare? Slide 23-70
71 Series Resistors In a circuit with one bulb, circuit A, a battery drives the current I A = ℇ/R through the bulb. In a circuit, with two bulbs (in series) with the same resistance R, circuit B, the equivalent resistance is R eq = 2R. The current running through the bulbs in the circuit B is I B = ℇ/2R. Since the emf from the battery and the resistors are the same in each circuit, I B = ½ I A. The two bulbs in circuit B are equally bright, but they are dimmer than the bulb in circuit A because there is less current. Slide 23-71
72 Series Resistors A battery is a source of potential difference, not a source of current. The battery does provide the current in a circuit, but the amount of current depends on the resistance. The amount of current depends jointly on the battery s emf and the resistance of the circuit attached to the battery. Slide 23-72
73 Parallel Resistors In a circuit where two bulbs are connected at both ends, we say that they are connected in parallel. Slide 23-73
74 Conceptual Example 23.5 Brightness of bulbs in parallel Which lightbulb in the circuit of FIGURE is brighter: A or B? Or are they equally bright? Slide 23-74
75 Conceptual Example 23.5 Brightness of bulbs in parallel (cont.) Because the bulbs are identical, the currents through the two bulbs are equal and thus the bulbs are equally bright. Slide 23-75
76 Conceptual Example 23.5 Brightness of bulbs in parallel (cont.) ASSESS One might think that A would be brighter than B because current takes the shortest route. But current is determined by potential difference, and two bulbs connected in parallel have the same potential difference. Slide 23-76
77 Parallel Resistors The potential difference across each resistor in parallel is equal to the emf of the battery because both resistors are connected directly to the battery. Slide 23-77
78 Parallel Resistors The current I bat from the battery splits into currents I 1 and I 2 at the top of the junction. According to the junction law, Applying Ohm s law to each resistor, we find that the battery current is Slide 23-78
79 Parallel Resistors Can we replace a group of parallel resistors with a single equivalent resistor? To be equivalent, ΔV must equal ℇ and I must equal I bat : This is the equivalent resistance, so a single R eq acts exactly the same as multiple resistors. Slide 23-79
80 Parallel Resistors Slide 23-80
81 Parallel Resistors How does the brightness of bulb B compare to that of bulb A? Each bulb is connected to the same potential difference, that of the battery, so they all have the same brightness. In the second circuit, the battery must power two lightbulbs, so it provides twice as much current. Slide 23-81
82 QuickCheck What things about the resistors in this circuit are the same for all three? A. Current I B. Potential difference V C. Resistance R D. A and B E. B and C Slide 23-82
83 QuickCheck What things about the resistors in this circuit are the same for all three? A. Current I B. Potential difference V C. Resistance R D. A and B E. B and C Slide 23-83
84 QuickCheck Which resistor dissipates more power? A. The 9 resistor B. The 1 resistor C. They dissipate the same power Slide 23-84
85 QuickCheck Which resistor dissipates more power? A. The 9 resistor B. The 1 resistor C. They dissipate the same power Slide 23-85
86 Example 23.6 Current in a parallel resistor circuit The three resistors of FIGURE are connected to a 12 V battery. What current is provided by the battery? [Insert Figure 23.22] Slide 23-86
87 Example 23.6 Current in a parallel resistor circuit (cont.) PREPARE The three resistors are in parallel, so we can reduce them to a single equivalent resistor, as in FIGURE Slide 23-87
88 Example 23.6 Current in a parallel resistor circuit (cont.) SOLVE We can use Equation to calculate the equivalent resistance: Once we know the equivalent resistance, we can use Ohm s law to calculate the current leaving the battery: Slide 23-88
89 Example 23.6 Current in a parallel resistor circuit (cont.) Because the battery can t tell the difference between the original three resistors and this single equivalent resistor, the battery in Figure provides a current of 0.66 A to the circuit. ASSESS As we ll see, the equivalent resistance of a group of parallel resistors is less than the resistance of any of the resistors in the group. 18 Ω is less than any of the individual values, a good check on our work. Slide 23-89
90 Parallel Resistors It would seem that more resistors would imply more resistance. This is true for resistors in series, but not for resistors in parallel. Parallel resistors provide more pathways for charge to get through. The equivalent of several resistors in parallel is always less than any single resistor in the group. An analogy is driving in heavy traffic. If there is an alternate route for cars to travel, more cars will be able to flow. Slide 23-90
91 QuickCheck The battery current I is A. 3 A B. 2 A C. 1 A D. 2/3 A E. 1/2 A Slide 23-91
92 QuickCheck The battery current I is A. 3 A B. 2 A C. 1 A D. 2/3 A E. 1/2 A Slide 23-92
93 QuickCheck The battery current I is A. 3 A B. 2 A C. 1 A D. 2/3 A E. 1/2 A Slide 23-93
94 QuickCheck The battery current I is A. 3 A B. 2 A C. 1 A D. 2/3 A E. 1/2 A Slide 23-94
95 QuickCheck When the switch closes, the battery current A. Increases. B. Stays the same. C. Decreases. Slide 23-95
96 QuickCheck When the switch closes, the battery current A. Increases. B. Stays the same. C. Decreases. Equivalent resistance decreases. Potential difference is unchanged. Slide 23-96
97 QuickCheck 23.2 The three bulbs are identical and the two batteries are identical. Compare the brightnesses of the bulbs. A. A B C B. A C B C. A B C D. A B C E. A B C Slide 23-97
98 QuickCheck 23.2 The three bulbs are identical and the two batteries are identical. Compare the brightnesses of the bulbs. A. A B C B. A C B C. A B C D. A B C E. A B C This question is checking your initial intuition. We ll return to it later. Slide 23-98
99 QuickCheck 23.3 The three bulbs are identical and the two batteries are identical. Compare the brightnesses of the bulbs. A. A B C B. A C B C. A B C D. A B C E. A B C Slide 23-99
100 QuickCheck 23.3 The three bulbs are identical and the two batteries are identical. Compare the brightnesses of the bulbs. A. A B C B. A C B C. A B C D. A B C E. A B C This question is checking your initial intuition. We ll return to it later. Slide
101 QuickCheck The lightbulbs are identical. Initially both bulbs are glowing. What happens when the switch is closed? A. Nothing. B. A stays the same; B gets dimmer. C. A gets brighter; B stays the same. D. Both get dimmer. E. A gets brighter; B goes out. Slide
102 QuickCheck The lightbulbs are identical. Initially both bulbs are glowing. What happens when the switch is closed? A. Nothing. B. A stays the same; B gets dimmer. C. A gets brighter; B stays the same. D. Both get dimmer. E. A gets brighter; B goes out. Short circuit. Zero resistance path. Slide
103 Example Problem What is the current supplied by the battery in the following circuit? Slide
104 Example Problem A resistor connected to a power supply works as a heater. Which of the following two circuits will provide more power? Slide
105 Section 23.4 Measuring Voltage and Current
106 Measuring Voltage and Current An ammeter is a device that measures the current in a circuit element. Because charge flows through circuit elements, an ammeter must be placed in series with the circuit element whose current is to be measured. Slide
107 Measuring Voltage and Current In order to determine the resistance in this simple, oneresistor circuit with a fixed emf of 1.5 V, we must know the current in the circuit. Slide
108 Measuring Voltage and Current To determine the current in the circuit, we insert the ammeter. To do so, we must break the connection between the battery and the resistor. Because they are in series, the ammeter and the resistor have the same current. The resistance of an ideal ammeter is zero so that it can measure the current without changing the current. Slide
109 Measuring Voltage and Current In this circuit, the ammeter reads a current I = 0.60 A. If the ammeter is ideal, there is no potential difference across it. The potential difference across the resistor is ΔV = ℇ. The resistance is then calculated: Slide
110 Measuring Voltage and Current A voltmeter is used to measure the potential differences in a circuit. Because the potential difference is measured across a circuit element, a voltmeter is placed in parallel with the circuit element whose potential difference is to be measured. Slide
111 Measuring Voltage and Current An ideal voltmeter has infinite resistance so that it can measure the voltage without changing the voltage. Because it is in parallel with the resistor, the voltmeter s resistance must be very large so that it draws very little current. Slide
112 Measuring Voltage and Current The voltmeter finds the potential difference across the 24 Ω resistor to be 6.0 V. The current through the resistor is: Slide
113 Measuring Voltage and Current Kirchhoff s law gives the potential difference across the unknown resistor: ΔV R = 3.0V Slide
114 QuickCheck What does the voltmeter read? A. 6 V B. 3 V C. 2 V D. Some other value E. Nothing because this will fry the meter. Slide
115 QuickCheck What does the voltmeter read? A. 6 V B. 3 V C. 2 V D. Some other value E. Nothing because this will fry the meter. Slide
116 QuickCheck What does the ammeter read? A. 6 A B. 3 A C. 2 A D. Some other value E. Nothing because this will fry the meter. Slide
117 QuickCheck What does the ammeter read? A. 6 A B. 3 A C. 2 A D. Some other value E. Nothing because this will fry the meter. Slide
118 Section 23.5 More Complex Circuits
119 More Complex Circuits Combinations of resistors can often be reduced to a single equivalent resistance through a step-by-step application of the series and parallel rules. Two special cases: Two identical resistors in series: R eq = 2R Two identical resistors in parallel: R eq = R/2 Slide
120 Example 23.8 How does the brightness change? Initially the switch in FIGURE is open. Bulbs A and B are equally bright, and bulb C is not glowing. What happens to the brightness of A and B when the switch is closed? And how does the brightness of C then compare to that of A and B? Assume that all bulbs are identical. Slide
121 Example 23.8 How does the brightness change? (cont.) SOLVE Suppose the resistance of each bulb is R. Initially, before the switch is closed, bulbs A and B are in series; bulb C is not part of the circuit. A and B are identical resistors in series, so their equivalent resistance is 2R and the current from the battery is This is the initial current in bulbs A and B, so they are equally bright. Slide
122 Example 23.8 How does the brightness change? (cont.) Closing the switch places bulbs B and C in parallel with each other. The equivalent resistance of the two identical resistors in parallel is R B+C = R/2. This equivalent resistance of B and C is in series with bulb A; hence the total resistance of the circuit is and the current leaving the battery is Closing the switch decreases the total circuit resistance and thus increases the current leaving the battery. Slide
123 Example 23.8 How does the brightness change? (cont.) All the current from the battery passes through bulb A, so A increases in brightness when the switch is closed. The current I after then splits at the junction. Bulbs B and C have equal resistance, so the current divides equally. The current in B is (ℇ/R), which is less than I before. Thus B decreases in brightness when the switch is closed. With the switch closed, bulbs B and C are in parallel, so bulb C has the same brightness as bulb B. Slide
124 Example 23.8 How does the brightness change? (cont.) ASSESS Our final results make sense. Initially, bulbs A and B are in series, and all of the current that goes through bulb A goes through bulb B. But when we add bulb C, the current has another option it can go through bulb C. This will increase the total current, and all that current must go through bulb A, so we expect a brighter bulb A. But now the current through bulb A can go through bulbs B and C. The current splits, so we d expect that bulb B will be dimmer than before. Slide
125 Analyzing Complex Circuits Text: p. 739 Slide
126 Analyzing Complex Circuits Text: p. 739 Slide
127 Analyzing Complex Circuits Text: p. 739 Slide
128 Example Problem What is the current supplied by the battery in the following circuit? What is the current through each resistor in the circuit? What is the potential difference across each resistor? Slide
129 Example Problem What is the equivalent resistance of the following circuit? Slide
130 Summary: General Principles Text: p. 753 Slide
131 Summary: General Principles Text: p. 753 Slide
132 Summary: General Principles Text: p. 753 Slide
133 Summary: Important Concepts Text: p. 753 Slide
134 Summary: Important Concepts Text: p. 753 Slide
135 Summary: Applications Text: p. 753 Slide
136 Summary: Applications Text: p. 753 Slide
137 Summary Text: p. 753 Slide
138 Summary Text: p. 753 Slide
139 Summary Text: p. 753 Slide
18-3 Circuit Analogies, and Kirchoff s Rules
18-3 Circuit Analogies, and Kirchoff s Rules Analogies can help us to understand circuits, because an analogous system helps us build a model of the system we are interested in. For instance, there are
PH213 Chapter 26 solutions
PH213 Chapter 26 solutions 26.6. IDENTIFY: The potential drop is the same across the resistors in parallel, and the current into the parallel combination is the same as the current through the 45.0-Ω resistor.
Chapter 13. Electric Circuits
Chapter 13 Electric Circuits Lower Potential Battery (EMF - E) - + Higher Potential Bulb (Resistor) Wires (No Change in Potential) EMF (Voltage Source) _ + Resistor Working Circuits For a circuit to work,
PHYS102 Previous Exam Problems. Circuits
PHYS102 Previous Exam Problems CHAPTER 27 Circuits Combination of resistors Potential differences Single loop circuits Kirchhoff laws Multiloop circuits RC circuits General 1. Figure 1 shows two resistors
Resistors in Series or in Parallel
Resistors in Series or in Parallel Key Terms series parallel Resistors in Series In a circuit that consists of a single bulb and a battery, the potential difference across the bulb equals the terminal
Series and parallel resistances
Series and parallel resistances Objectives Calculate the equivalent resistance for resistors connected in both series and parallel combinations. Construct series and parallel circuits of lamps (resistors).
Chapter 20. Circuits. q I = t. (a) (b) (c) Energy Charge
Chapter 0 n an electric circuit, an energy source and an energy consuming device are connected by conducting wires through which electric charges move. Circuits Within a battery, a chemical reaction occurs
Series and Parallel DC Circuits
Series and Parallel DC Circuits asic Circuits n electric circuit is closed loop of conductive material (metal wire) that connects several circuit elements together (batteries, resistors, capacitors, etc.)
Chapter 23: Circuits Solutions
Chapter 3: Circuits Solutions Questions: (4, 5), 14, 7, 8 Exercises & Problems: 5, 11, 19, 3, 6, 41, 49, 61 Q3.4,5: The circuit has two resistors, with 1 >. (a) Which resistor dissipates the larger amount
Physics 227: Lecture 11 Circuits, KVL, KCL, Meters
Physics 227: Lecture 11 Circuits, KVL, KCL, Meters Lecture 10 review: EMF ξ is not a voltage V, but OK for now. Physical emf source has V ab = ξ - Ir internal. Power in a circuit element is P = IV. For
Unit 3. Electrical Circuits
Strand G. Electricity Unit 3. Electrical Circuits Contents Page Representing Direct Current Circuits 2 Rules for Series Circuits 5 Rules for Parallel Circuits 9 Circuit Calculations 14 G.3.1. Representing
Chapter 20 Electric Circuits
Chapter 20 Electric Circuits 1 20.1 Electromotive Force and Current In an electric circuit, an energy source and an energy consuming device are connected by conducting wires through which electric charges
Exam 2. Name: Class: Date: Multiple Choice Identify the choice that best completes the statement or answers the question.
Name: Class: Date: Exam 2 Multiple Choice Identify the choice that best completes the statement or answers the question. 1. For this circuit, which of these equations is correct? a. 80-1I 2-20I 2-30I 1
1 A 60-W light bulb operating on a 120-volt household circuit has a resistance closest to
Slide 1 / 31 1 A 60-W light bulb operating on a 120-volt household circuit has a resistance closest to A 60 Ω B 120 Ω C 240 Ω D 180 Ω E 360 Ω Slide 2 / 31 2 Which of the following is equivalent to the
PhysicsAndMathsTutor.com 1
PhysicsAndMathsTutor.com 1 1. The figure below shows a circuit containing a battery of e.m.f. 12 V, two resistors, a light-dependent resistor (LDR), an ammeter and a switch S. The battery has negligible
Closed circuit complete path for electrons follow. Open circuit no charge flow and no current.
Section 1 Schematic Diagrams and Circuits Electric Circuits, continued Closed circuit complete path for electrons follow. Open circuit no charge flow and no current. short circuit closed circuit, no load.
Book page Syllabus 2.8, 2.9, Series and parallel circuits
Book page 77 79 Syllabus 2.8, 2.9, 2.14 Series and parallel circuits Find the Fib! (1) The symbol for a bulb is (2) In a parallel circuit potential difference is the same as the supply voltage on all branches.
The Fundamentals of Circuits
The Fundamentals of Circuits Now that we have an understanding of current and resistance, we re ready to start studying basic direct current (DC)circuits. We ll start with resistor circuits, and then move
Pre-Lab for Batteries and Bulbs
Pre-Lab for Batteries and Bulbs Complex circuits composed of resistors can be simplified by using the concept of equivalent resistors. For example if resistors R 1, R 2, and R 3 are connected in series,
Chapter 26: Direct current circuit
Chapter 26: Direct current circuit Resistors in circuits Equivalent resistance The nature of the electric potential and current in circuit Kirchhoff s rules (for complicated circuit analysis) Resistors
Electric Circuits. Physics 6 th Six Weeks
Electric Circuits Physics 6 th Six Weeks Electric Circuits (a review) A circuit is a path through which electricity can flow Electric Circuits always contain 3 things: a voltage source, a conductor (usually
Unit 12 - Electric Circuits. By: Albert Hall
Unit 12 - Electric Circuits By: Albert Hall Unit 12 - Electric Circuits By: Albert Hall Online: < http://cnx.org/content/col12001/1.1/ > OpenStax-CNX This selection and arrangement of content as a collection
Electromagnetism Unit- Current Sub-Unit
4.2.1 Electrical Current Definitions current unit: or requires: Example #3 A wire carries a current of 50 amperes. How much charge flows through the wire in 10 seconds? How many electrons pass through
Series and Parallel Resistors
Series and Parallel Resistors Today you will investigate how connecting resistors in series and in parallel affects the properties of a circuit. You will assemble several circuits and measure the voltage
AP Physics - Problem Drill 14: Electric Circuits
AP Physics - Problem Drill 14: Electric Circuits No. 1 of 10 1. Identify the four electric circuit symbols. (A) 1. AC power 2. Battery 3. Light Bulb 4. Resistor (B) 1. Ammeter 2. Resistor 3. AC Power 4.
2 Which arrangement of identical resistors would draw the most current when connected to the same potential difference?
Show all necessary workings for multiple choice. Current Electricity Assignment 2 Name: 1 A circuit consists of a battery and three resistors. The resistors are of unequal value and are connected in parallel.
Section 18.1 Sources of emf. Section 18.2 Resistors in Series. Section 18.3 Resistors in Parallel
PROBLEMS 1, 2, 3 = straightforward, intermediate, challenging = full solution available in Student Solutions Manual/Study Guide = biomedical application Section 18.1 Sources of emf Section 18.2 Resistors
Chapters 35: Electric Circuits
Text: Chapter 35 Think and Explain: 1-10 Think and Solve: 1-4 Chapters 35: Electric Circuits NME: Vocabulary: ammeter, voltmeter, series, parallel, equivalent resistance, circuit, short circuit, open circuit
ECE215 Lecture 7 Date:
Lecture 7 Date: 29.08.2016 AC Circuits: Impedance and Admittance, Kirchoff s Laws, Phase Shifter, AC bridge Impedance and Admittance we know: we express Ohm s law in phasor form: where Z is a frequency-dependent
Electric Circuits Notes 1 Circuits
Electric Circuits Notes 1 Circuits In the last chapter we examined how static electric charges interact with one another. These fixed electrical charges are not the same as the electricity that we use
Bell Ringer: Define to the best of your ability the definition of: Current Voltage Resistance
Bell Ringer: Define to the best of your ability the definition of: Current Voltage Resistance Explain the behavior of the current and the voltage in a Series Circuit. Explain the behavior of the current
Intermediate Physics PHYS102
Intermediate Physics PHYS102 Dr Richard H. Cyburt Assistant Professor of Physics My office: 402c in the Science Building My phone: (304) 384-6006 My email: rcyburt@concord.edu My webpage: www.concord.edu/rcyburt
Kirchhoff s laws. Objectives. Assessment. Assessment. Assessment. Assessment 5/27/14. Apply Kirchhoff s first and second laws.
Kirchhoff s laws Objectives Apply Kirchhoff s first and second laws. Calculate the current and voltage for resistor circuits connected in parallel. Calculate the current and voltage for resistor circuits
ELECTRIC CIRCUIT PROBLEMS 12 AUGUST 2014
ELECTRIC CIRCUIT PROBLEMS 12 AUGUST 2014 In this lesson we: Lesson Description Discuss the application of Ohm s Law Explain the series and parallel connection of resistors Discuss the effect of internal
1 V = IR P = IV R eq. 1 R i. = R i. = R eq. V = Energy Q. I = Q t
Chapters 34 & 35: Electric Circuits NAME: Text: Chapter 34 Chapter 35 Think and Explain: 1-3, 6-8, 10 Think and Explain: 1-10 Think and Solve: 1-6 Think and Solve: 1-4 Vocabulary: Ohm s Law, resistance,
CHAPTER 3: ELECTRIC CURRENT AND DIRECT CURRENT CIRCUIT
CHAPTER 3: ELECTRIC CURRENT AND DIRECT CURRENT CIRCUIT PSPM II 2005/2006 NO. 3 3. (a) Write Kirchhoff s law for the conservation of energy. FIGURE 2 (b) A circuit of two batteries and two resistors is
PHYSICS 3204 PUBLIC EXAM QUESTIONS (Electric Circuits)
PHYSICS 3204 PUBLIC EXAM QUESTIONS (Electric Circuits) NAME: August 2009------------------------------------------------------------------------------------------------------------------ 26. What is the
EE215 FUNDAMENTALS OF ELECTRICAL ENGINEERING
EE215 FUNDAMENTALS OF ELECTRICAL ENGINEERING Tai-Chang Chen University of Washington, Bothell Spring 2010 EE215 1 1 WEEK 2 SIMPLE RESISTIVE CIRCUITS April 9 th, 2010 TC Chen UWB 2010 EE215 2 2 QUESTIONS
DC CIRCUITS AND OHM'S LAW
July 15, 2008 DC Circuits and Ohm s Law 1 Name Date Partners DC CIRCUITS AND OHM'S LAW AMPS - VOLTS OBJECTIVES OVERVIEW To learn to apply the concept of potential difference (voltage) to explain the action
Električni krugovi. Copyright 2015 John Wiley & Sons, Inc. All rights reserved.
Električni krugovi 20.1 Electromotive Force and Current In an electric circuit, an energy source and an energy consuming device are connected by conducting wires through which electric charges move. 20.1
VISUAL PHYSICS ONLINE. Experiment PA41A ELECTRIC CIRCUITS
VISUAL PHYSICS ONLINE Experiment PA41A ELECTRIC CIRCUITS Equipment (see Appendices) 12V DC power supply (battery): multimeter (and/or milliammeter and voltmeter); electrical leads; alligator clips; fixed
Q3.: When switch S is open, the ammeter in the circuit shown in Fig 2 reads 2.0 A. When S is closed, the ammeter reading: (Ans: increases)
Old Exams-Chapter 27 T081 Q1. Fig 1 shows two resistors 3.0 Ω and 1.5 Ω connected in parallel and the combination is connected in series to a 4.0 Ω resistor and a 10 V emf device. The potential difference
Lightbulbs and Dimmer Switches: DC Circuits
Introduction It is truly amazing how much we rely on electricity, and especially on devices operated off of DC current. Your PDA, cell phone, laptop computer and calculator are all examples of DC electronics.
Electrical Circuits I (ENGR 2405) Chapter 2 Ohm s Law, KCL, KVL, Resistors in Series/Parallel
Electrical Circuits I (ENG 2405) Chapter 2 Ohm s Law, KCL, KVL, esistors in Series/Parallel esistivity Materials tend to resist the flow of electricity through them. This property is called resistance
Charge Current Voltage
ECE110 Introduction to Electronics What is? Charge Current Voltage 1 Kirchhoff s Current Law Current in = Current out Conservation of charge! (What goes in must come out, or the total coming in is zero)
electronics fundamentals
electronics fundamentals circuits, devices, and applications THOMAS L. FLOYD DAVID M. BUCHLA chapter 6 Identifying series-parallel relationships Most practical circuits have combinations of series and
HANDS-ON ACTIVITY 4 BUILDING SERIES AND PARALLEL CIRCUITS BACKGROUND WIRING DIRECTIONS
ACTIVITY 4 BUILDING SERIES AND PARALLEL CIRCUITS BACKGROUND Make sure you read the background in Activity 3 before doing this activity. WIRING DIRECTIONS Materials per group of two: one or two D-cells
21.1 Resistors in Series and Parallel
808 Chapter 21 Circuits and DC Instruments Explain why batteries in a flashlight gradually lose power and the light dims over time. Describe what happens to a graph of the voltage across a capacitor over
E 1 Ι 1 R 1 R 2 Ι 3 R 3 E 2 Ι 2
1 (a) A student has been asked to make an electric heater. The heater is to be rated as 12 V 60 W, and is to be constructed of wire of diameter 0.54 mm. The material of the wire has resistivity 4.9 x 10
Electric Current & DC Circuits
Electric Current & DC Circuits PSI AP Physics B Name Multiple-Choice 1. The length of an aluminum wire is quadrupled and the radius is doubled. By which factor does the resistance change? (A) 2 (B) 4 (C)
PHYS 102 Quiz Problems Chapter 27 : Circuits Dr. M. F. Al-Kuhaili
PHYS 102 Quiz Problems Chapter 27 : Circuits Dr. M. F. Al-Kuhaili 1. (TERM 002) (a) Calculate the current through each resistor, assuming that the batteries are ideal. (b) Calculate the potential difference
ELECTRIC CIRCUITS. 1. Which one of the following situations results in a conventional electric current that flows westward?
chapter ELECTRIC CIRCUITS www.tutor-homework.com (for tutoring, homework help, or help with online classes) Section 20.1 Electromotive Force and Current Section 20.2 Ohm s Law 1. Which one of the following
Forces and Electrical Charges
CHAPTER 7 BLM 3-8 Forces and Electrical Charges Goal Review your knowledge of electric charge and its interaction with conductors, insulators, and electroscopes. Answer the questions that follow. 1. Classify
A battery transforms chemical energy into electrical energy. Chemical reactions within the cell create a potential difference between the terminals
D.C Electricity Volta discovered that electricity could be created if dissimilar metals were connected by a conductive solution called an electrolyte. This is a simple electric cell. The Electric Battery
Fig [5]
![Fig [5]](/thumbs/82/85456687.jpg "Fig [5]")
1 (a) Fig. 4.1 shows the I-V characteristic of a light-emitting diode (LED). 40 I / 10 3 A 30 20 10 0 1.0 1.5 2.0 V / V Fig. 4.1 (i) In Describe the significant features of the graph in terms of current,
Ohm s Law and Electrical Circuits
Ohm s Law and Electrical Circuits INTRODUCTION In this experiment, you will measure the current-voltage characteristics of a resistor and check to see if the resistor satisfies Ohm s law. In the process
Chapter 1: DC circuit basics
Chapter 1: DC circuit basics Overview Electrical circuit design depends first and foremost on understanding the basic quantities used for describing electricity: voltage, current, and power. In the simplest
Lab 4 OHM S LAW AND KIRCHHOFF S CIRCUIT RULES
57 Name Date Partners Lab 4 OHM S LAW AND KIRCHHOFF S CIRCUIT RULES AMPS - VOLTS OBJECTIVES To learn to apply the concept of potential difference (voltage) to explain the action of a battery in a circuit.
Name: Period: Date: 2. In the circuit below, n charge carriers pass the point P in a time t. Each charge carrier has charge q.
Name: Period: Date: IB-1 Practice Electrical Currents, Resistance, and Circuits Multiple Choice Questions 1. In the circuit below, which meter is not correctly connected? A 1 3 A 2 4 A. 1 B. 2 C. 3 D.
Electric Current - 1 v Goodman & Zavorotniy
Chapter Problems Electric Current Classwork 1. If 560 C of electric charge passed through a light bulb in 8 min; what was the magnitude of the average electric current passing through the bulb? 2. If the
Period 12 Activity Sheet Solutions: Electric Circuits
Period 2 Activity Sheet Solutions: Electric Circuits Activity 2.: How are Voltage, Current, and Resistance Related? a) Data Collection Connect the DC power supply to the thin 30 cm length of nichrome wire.
10 DIRECT-CURRENT CIRCUITS
Chapter 10 Direct-Current Circuits 435 10 DIRECT-CURRENT CIRCUITS Figure 10.1 This circuit shown is used to amplify small signals and power the earbud speakers attached to a cellular phone. This circuit
ELE.B: Original Assignment Resistors in Series Classwork Homework
ELE.B: Original Assignment Resistors in Series Classwork 1. A 3 Ω resistor is connected in series to a 6 Ω resistor and a 12-V battery. What is the current in each of the resistors? What is the voltage
Direct Current Circuits
PC1143 Physics III Direct Current Circuits 1 Objectives Apply Kirchhoff s rules to several circuits, solve for the currents in the circuits and compare the theoretical values predicted by Kirchhoff s rule
Chapter 28. Direct Current Circuits
Chapter 28 Direct Current Circuits Outline 28.1 Electromotive Force 28.2 Resistors in Series and Parallel 28.3 Kirchhoff s Rules 28.1 Electromotive Force (emf) Because the potential difference at the battery
These are samples of learning materials and may not necessarily be exactly the same as those in the actual course. Contents 1.
Contents These are samples of learning materials and may not necessarily be exactly the same as those in the actual course. Contents 1 Introduction 2 Ohm s law relationships 3 The Ohm s law equation 4
RESISTANCE & OHM S LAW (PART I
RESISTANCE & OHM S LAW (PART I and II) Objectives: To understand the relationship between potential and current in a resistor and to verify Ohm s Law. To understand the relationship between potential and
DC Circuits. (a) You drag an element by clicking on the body of the element and dragging it.
DC Circuits KET Virtual Physics Labs Worksheet Lab 12-1 As you work through the steps in the lab procedure, record your experimental values and the results on this worksheet. Use the exact values you record
Circuits and Circuit Elements
Circuits and Circuit Elements Schematic Diagrams A diagram that depicts the construction of an electrical apparatus is called a schematic diagram These diagrams use symbols to represent the bulb, battery,
Chapter 1: DC circuit basics
Chapter 1: DC circuit basics Overview Electrical circuit design depends first and foremost on understanding the basic quantities used for describing electricity: Voltage, current, and power. In the simplest
DC Circuits Series, Parallel, and Combination Circuits
DC Circuits Series, Parallel, and Combination Circuits PURPOSE To investigate resistors wired in series and parallel as well as combinations of the two. To examine how current behaves at junction points
Problem Solving 7: Building Simple Circuits using PhET Interactive Simulation 1
MASSACHUSETTS INSTITUTE OF TECHNOLOGY Department of Physics Problem Solving 7: Building Simple Circuits using PhET Interactive Simulation 1 Section Table and Group Names Hand in one copy per group at the
charge time Electric Current and Circuits Current HEAT will flow if there is a difference in temperature
Electric Current and Circuits Electrons will flow if there is a difference in electric pressure. Electric pressure is called Potential, and is measured in Volts. If there is no difference in pressure from
Experiment 3. Ohm s Law. Become familiar with the use of a digital voltmeter and a digital ammeter to measure DC voltage and current.
Experiment 3 Ohm s Law 3.1 Objectives Become familiar with the use of a digital voltmeter and a digital ammeter to measure DC voltage and current. Construct a circuit using resistors, wires and a breadboard
Experiment 2. Ohm s Law. Become familiar with the use of a digital voltmeter and a digital ammeter to measure DC voltage and current.
Experiment 2 Ohm s Law 2.1 Objectives Become familiar with the use of a digital voltmeter and a digital ammeter to measure DC voltage and current. Construct a circuit using resistors, wires and a breadboard
CK-12 Physics Concepts - Intermediate Answer Key
Chapter 19: Electrical Circuits 19.1 Series Circuits CK-12 Physics Concepts - Intermediate Answer Key 1. There are three 20.0 Ohm resistors connected in series across a 120 V generator. a. What is the
1. The coulomb is a unit of. A. charge B. voltage C. energy D. capacitance E. current. 2. The following is not true about voltage:
BioE 1310 - Review 1 - DC 1/16/2017 Instructions: On the Answer Sheet, enter your 2-digit ID number (with a leading 0 if needed) in the boxes of the ID section. Fill in the corresponding numbered circles.
Objective of the Lecture
Objective of the Lecture Present Kirchhoff s Current and Voltage Laws. Chapter 5.6 and Chapter 6.3 Principles of Electric Circuits Chapter4.6 and Chapter 5.5 Electronics Fundamentals or Electric Circuit
Circuits. Ch. 35 in your text book
Circuits Ch. 35 in your text book Objectives Students will be able to: 1) Draw schematic symbols for electrical circuit components 2) Calculate the equivalent resistance for a series circuit 3) Calculate
Unit 3.C Electrical Theory, Circuits Essential Fundamentals of Electrical Theory, Circuits
Unit 3.C Electrical Theory, Circuits Essential Fundamentals of Electrical Theory, Circuits Early Booklet E.C.: + 1 Unit 3.C Hwk. Pts.: / 36 Unit 3.C Lab Pts.: / 50 Late, Incomplete, No Work, No Units Fees?
DC Circuits Series, Parallel, and Combination Circuits
Name _ Purpose School Date DC Circuits Series, Parallel, and Combination Circuits To investigate resistors wired in series and parallel as well as combinations of the two To examine how current behaves
Fundamentals of Electric Circuits Chapter 2. Copyright The McGraw-Hill Companies, Inc. Permission required for reproduction or display.
Fundamentals of Electric Circuits Chapter 2 Copyright The McGraw-Hill Companies, Inc. Permission required for reproduction or display. Overview This chapter will introduce Ohm s law: a central concept
OHM'S LAW AND RESISTANCE NETWORKS OBJECT
17 E7 E7.1 OHM'S LAW AND RESISTANCE NETWORKS OBJECT The objects of this experiment are to determine the voltage-current relationship for a resistor and to verify the series and parallel resistance formulae.
Electric Circuits. Alternate Units. V volt (V) 1 V = 1 J/C V = E P /q V = W/q. Current I ampere (A) 1 A = 1 C/s V = IR I = Δq/Δt
Electric Circuits Quantity Symbol Units Charge Q,q coulomb (C) Alternate Units Formula Electric Potential V volt (V) 1 V = 1 J/C V = E P /q V = W/q Work, energy W, E P joule (J) W = qv E P = qv Current
DC Circuits -- Conceptual Questions. 1.) What is the difference between voltage and current?
DC Circuits DC Circuits -- Conceptual Questions 1.) What is the difference between voltage and current? 2.) A 12 ohm resistor has 2 amps of current passing through it. How much work does the resistor do
Solving Parallel and Mixed Circuits, and Kirchhoff s Current Law
Exercise 7 Solving Parallel and Mixed Circuits, and Kirchhoff s Current Law EXERCISE OBJECTIVE When you have completed this exercise, you will be able to calculate the equivalent resistance of multiple
CURRENT ELECTRICITY. 1. The S.I. unit of power is (a) Henry (b) coulomb (c) watt (d) watt-hour Ans: c
CURRENT ELECTRICITY 1. The S.I. unit of power is (a) Henry (b) coulomb (c) watt (d) watt-hour 2. Electric pressure is also called (a) resistance (b) power (c) voltage (d) energy 3. The substances which
Unit 6 ~ Learning Guide Name:
Unit 6 ~ Learning Guide Name: Instructions: Using a pencil, complete the following notes as you work through the related lessons. Show ALL work as is explained in the lessons. You are required to have
Voltage, Current and Resistance
Voltage, Current and Resistance Foundations in Engineering WV Curriculum, 2002 Foundations in Engineering Content Standards and Objectives 2436.8.3 Explain the relationship between current, voltage, and
Electric Circuits. Have you checked out current events today?
Electric Circuits Have you checked out current events today? Circuit Symbolism We can simplify this circuit by using symbols All circuits have an energy source and a load, with wires completing the loop
The following symbols are used in electric circuits:
Circuit Electricity The following symbols are used in electric circuits: Four devices are commonly used in the laboratory to study Ohm s law: the battery, the voltmeter, the ammeter and a resistance. The
Series Circuits and Kirchoff s Voltage Law
ELEN 236 Series and Parallel Circuits www.okanagan.bc.ca/electronics Series Circuits and Kirchoff s Voltage Law Reference All About Circuits->DC->Chapter 5 and Chapter 6 Questions: CurrentVoltageResistance:
A battery transforms chemical energy into electrical energy. Chemical reactions within the cell create a potential difference between the terminals
D.C Electricity Volta discovered that electricity could be created if dissimilar metals were connected by a conductive solution called an electrolyte. This is a simple electric cell. The Electric Battery
Electrical Measurements
Electrical Measurements INTRODUCTION In this section, electrical measurements will be discussed. This will be done by using simple experiments that introduce a DC power supply, a multimeter, and a simplified
University f P rtland Sch l f Engineering
University f P rtland Sch l f Engineering Electric Circuits 101 Wednesday, November 31, 2012 (10312012) Happy Halloween! Copyright by Aziz S. Inan, Ph.D. http://faculty.up.edu/ainan/ Math puzzler # 1:
Circuitry II. Name: Date: Section C D F. Mr. Alex Rawson Physics
Name: Date: Section C D F Circuitry II Mr. Alex Rawson Physics 1. Three resistors of 100, 140, and 80 are placed in a series circuit. a. Find the equivalent resistance. (Your answer should be between 0
Lab 3 DC CIRCUITS AND OHM'S LAW
43 Name Date Partners Lab 3 DC CIRCUITS AND OHM'S LAW AMPS + - VOLTS OBJECTIVES To learn to apply the concept of potential difference (voltage) to explain the action of a battery in a circuit. To understand
A piece of wire of resistance R is cut into five equal parts. These parts are then connected in
Page 221»Exercise» Question 1: A piece of wire of resistance R is cut into five equal parts. These parts are then connected in parallel. If the equivalent resistance of this combination is R', then the
I = q/ t units are C/s = A (ampere)
Physics I - Notes Ch. 19-20 Current, Resistance, and Electric Circuits Electromotive force (emf = ε = V; units are volts) charge pump ; source that maintains the potential difference (voltage) in a closed
Refer to your text book (page 349 to 352) (1) Draw a circuit diagram to represent the wiring in a typical parallel circuit.
SERIES and PARALLEL CIRCUITS Refer to your text book (page 349 to 352) (1) Draw a circuit diagram to represent the wiring in a typical parallel circuit. (2) What are some of the advantages of using parallel