Physics 227: Lecture 11 Circuits, KVL, KCL, Meters
|
|
- Emma Wells
- 5 years ago
- Views:
Transcription
1 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 a resistor with V = IR, P = IV = I2 R = V 2 /R. Light bulbs are rated in Watts, for fixed V over them. Higher power bulbs have lower resistance, do brightness of bulbs in series is opposite brightness of bulbs in parallel.
2 Definitions Node A node or junction: a place where 2 or more wires meet. Often shown in drawings as a solid circle. Elements (resistors, capacitors,...) in parallel: elements between the same two notes, necessarily have the same voltage over them. Elements in series: elements connected with a wire, with no nodes between them, so that they necessarily have the same current through them. E 2 E 1 and E 2 in series E 1 and E 2 in parallel E 1 E 1 E 2
3 Resistor iclicker Which of the following is true about the circuit shown? A. R1 is in parallel with R2. B. R1 is in parallel with R3. C. R2 is in parallel with R3. D. R1 is in series with R2 and/or R3. E. R2 is in series with R3.
4 Resistor iclicker Which of the following is true about the circuit shown? A. R1 is in parallel with R2. B. R1 is in parallel with R3. C. R2 is in parallel with R3. D. R1 is in series with R2 and/or R3. E. R2 is in series with R3. R2 and R3 are in series - they are connect with a wire and have the same current. No other resistors are in series. No resistors are in parallel - no two connect the same two nodes and necessarily have the same voltage.
5 KVL and KCL Two basic ideas for analyzing circuits: No charge buildup in a circuit: If wires meet, the sum of the currents into (or out of) a node is 0. i I i = 0. I 1 I 2 I 3 ``Kirchoff s Current Law If you go around a loop, the voltage is the same. You return to a position with the same potential and potential energy. i V i = 0. ``Kirchoff s Voltage Law V 4 V 3 V 1 V 2
6 Resistors in series KCL: there is the same current I through each of the resistors. V = V 1 + V 2 + V 3 = I(R 1 + R 2 + R 3 ). e.g.: V 1 / V = [ R 1 / (R 1 + R 2 + R 3 ) ]. We can replace several resistors in series with one equivalent resistor: R eq = R 1 + R 2 + R Resistors in series add. This is opposite the case for capacitors.
7 Resistors in parallel KVL: there is the same voltage V across each of the resistors. The total current I is split between the resistors. I = I 1 + I 2 + I 3 = V/R 1 + V/R 2 + V/R 3 = V(1/R 1 + 1/R 2 + 1/R 3 ). e.g.: I 1 / I = [ 1/R 1 / (1/R 1 + 1/R 2 + 1/R 3 ) ] = (R 2 R 3 ) / (R 1 R 2 + R 2 R 3 + R 1 R 3 ) We can replace several resistors in parallel with one equivalent resistor: 1/R eq = 1/R 1 + 1/R 2 + 1/R Resistors in parallel add inversely. This is opposite the case for capacitors.
8 Simple Networks - series / parallel
9 Simple Networks - series / parallel
10 Simple Networks - series / parallel
11 Simple Networks - series / parallel
12 Less Simple Networks - applying KVL/KCL Sometimes they will be solved as n equations in n unknowns, or perhaps we can more ``artfully find easy quantities first. This circuit cannot be simplified using parallel / series, we need to use KVL / KCL. Define the currents going around loops - do not worry about the actual current direction, if you guess wrong you will get negative numbers. Note the current through an element may be the sum of two loop currents. E.g.: I through r2 = I loop2 - I loop3 As shown, only two of I loop1, I loop2, and I loop3 are independent.
13 Cicuitous iclicker A. I is impossible to figure out. What is I? B. I = 0 A. C. I = 0.5 A. D. I = (8/9) A. E. I = (8/3) A.
14 Cicuitous iclicker What is I? Apply KVL going CCW around the circuit from b I-3I-4I-4-7I = I = 0 I = 1/2 A. I is impossible to figure out. B. I = 0 A. C. I = 0.5 A. D. I = (8/9) A. E. I = (8/3) A.
15 Less Simple Networks - applying KVL/KCL What is I? Use KCL at node a: I = 1 A + 2 A = 3 A What is r? Use KVL around loop 1: -(2 A)(3 Ω) + 12 V - (3 A)r = 0 r = 2 Ω What is ξ? Use KVL around loop 2: -(2 A)(3 Ω) - ξ + (1 A)(1 Ω) = 0 ξ = -5 V
16 Voltmeters and Ammeters Old electro-mechanical systems largely based on forces between current carrying wires and magnetic fields - a topic for the near future. Modern system all ICs.
17 Voltmeters and Ammeters For a voltmeter, you want a large internal meter resistance. Any current flowing through the meter does not flow through the circuit element, and changes what is happening in the circuit. Rest of circuit If R voltmeter is made too small, most of current flows through it, and there is a greater voltage in the rest of the circuit. Similarly, for ammeter you want R small. R voltmeter R to measure Voltage over
18 Voltmeters and Ammeters Ammeters and Voltmeters have a dial to turn. This allows us to select the ratio of R c to R s, varying the current through the meter, so that we can change the magnitude of voltage / current that gives a full scale reading. E.g.: too much current, needle pegged at full scale, increase R to reduce current. Too little current, reading insensitive due to small needle deflection, decrease R to get more current and more needle deflection.
19 Voltmeters and Ammeters Which is the right way to measure the resistance of a resistor?
20 Voltmeters and Ammeters Use an ohmmeter so you do not have any corrections.
21 Current iclicker A constant current source sends a current I through a resistor R. A second resistor R (<< R) is connected in parallel to the first resistor. What happens to the current I through the first resistor? A. I increases. B. I decreases, but not to 0. C. I decreases to 0. D. I stays the same. E. I cannot figure out what happens.
22 Current iclicker A constant current source sends a current I through a resistor R. A second resistor R (<< R) is connected in parallel to the first resistor. What happens to the current I through the first resistor? R R A. I increases. B. I decreases, but not to 0. C. I decreases to 0. D. I stays the same. E. I cannot figure out what happens. With just R, we have V=I 0 R. Resistors in parallel act as a current divider. The current will split between the two so that V = IR = I R, and I+I = I 0, or V (1/R + 1/R ) = I 0.
23 Thank you. See you monday.
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
More informationElectrical 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
More information18-3 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
More informationEE215 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
More informationChapter 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
More informationECE215 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
More informationSource Transformations
Source Transformations Introduction The circuits in this set of problems consist of independent sources, resistors and a meter. In particular, these circuits do not contain dependent sources. Each of these
More informationAP 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.
More informationPH213 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.
More informationelectronics 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
More informationChapter 23 Circuits. Chapter Goal: To understand the fundamental physical principles that govern electric circuits. Slide 23-1
Chapter 23 Circuits Chapter Goal: To understand the fundamental physical principles that govern electric circuits. Slide 23-1 Chapter 23 Preview Looking Ahead: Analyzing Circuits Practical circuits consist
More informationECE 215 Lecture 8 Date:
ECE 215 Lecture 8 Date: 28.08.2017 Phase Shifter, AC bridge AC Circuits: Steady State Analysis Phase Shifter the circuit current I leads the applied voltage by some phase angle θ, where 0 < θ < 90 ο depending
More informationUNIVERSITY OF NORTH CAROLINA AT CHARLOTTE Department of Electrical and Computer Engineering
UNIVERSITY OF NORTH CAROLINA AT CHARLOTTE Department of Electrical and Computer Engineering EXPERIMENT 8 NETWORK ANALYSIS OBJECTIVES The purpose of this experiment is to mathematically analyze a circuit
More informationSolution: Based on the slope of q(t): 20 A for 0 t 1 s dt = 0 for 3 t 4 s. 20 A for 4 t 5 s 0 for t 5 s 20 C. t (s) 20 C. i (A) Fig. P1.
Problem 1.24 The plot in Fig. P1.24 displays the cumulative charge q(t) that has entered a certain device up to time t. Sketch a plot of the corresponding current i(t). q 20 C 0 1 2 3 4 5 t (s) 20 C Figure
More informationLaboratory 2 (drawn from lab text by Alciatore)
Laboratory 2 (drawn from lab text by Alciatore) Instrument Familiarization and Basic Electrical Relations Required Components: 2 1k resistors 2 1M resistors 1 2k resistor Objectives This exercise is designed
More informationSeries 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.)
More informationELE.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
More informationIn this lecture, we will learn about some more basic laws governing the behaviour of electronic circuits beyond that of Ohm s law.
In this lecture, we will learn about some more basic laws governing the behaviour of electronic circuits beyond that of Ohm s law. 1 Consider this circuit here. There is a voltage source providing power
More informationCombined Series and Parallel Circuits
Combined Series and Parallel Circuits Objectives: 1. Calculate the equivalent resistance, current, and voltage of series and parallel circuits. 2. Calculate the equivalent resistance of circuits combining
More informationThese 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
More informationEE301 - SERIES CIRCUITS, KIRCHHOFF S VOLTAGE LAW
Learning Objectives a. Identify elements that are connected in series b. State and apply KVL in analysis of a series circuit c. Determine the net effect of series-aiding and series-opposing voltage sources
More information3.4 The Single-Loop Circuit Single-loop circuits
25 3.4 The Single-Loop Circuit Single-loop circuits Elements are connected in series All elements carry the same current We shall determine The current through each element The voltage across each element
More informationElectric 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
More informationSeries and Parallel Circuits. Series Connection
Series and Parallel Circuits When devices are connected in an electric circuits, they can be connected in series or in parallel with other devices. A Series Connection When devices are series, any current
More informationElectric Circuits I. Simple Resistive Circuit. Dr. Firas Obeidat
Electric Circuits I Simple Resistive Circuit Dr. Firas Obeidat 1 Resistors in Series The equivalent resistance of any number of resistors connected in series is the sum of the individual resistances. It
More informationXII PHYSICS INSTRUMENTS] CHAPTER NO. 15 [ELECTRICAL MEASURING MUHAMMAD AFFAN KHAN LECTURER PHYSICS, AKHSS, K
XII PHYSICS MUHAMMAD AFFAN KHAN LECTURER PHYSICS, AKHSS, K affan_414@live.com https://promotephysics.wordpress.com [ELECTRICAL MEASURING INSTRUMENTS] CHAPTER NO. 15 MOVING COIL GALVANOMETER An electrical
More informationPre-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,
More informationAnnouncements. To stop blowing fuses in the lab, note how the breadboards are wired. EECS 42, Spring 2005 Week 3a 1
Announcements New topics: Mesh (loop) method of circuit analysis Superposition method of circuit analysis Equivalent circuit idea (Thevenin, Norton) Maximum power transfer from a circuit to a load To stop
More informationLab 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.
More informationDC 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
More informationCurrent, resistance, and Ohm s law
Current, resistance, and Ohm s law Apparatus DC voltage source set of alligator clips 2 pairs of red and black banana clips 3 round bulb 2 bulb sockets 2 battery holders or 1 two-battery holder 2 1.5V
More informationElectric 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
More informationCircuits. 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
More informationSeries 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:
More informationAnnouncements. To stop blowing fuses in the lab, note how the breadboards are wired. EECS 42, Spring 2005 Week 3a 1
Announcements New topics: Mesh (loop) method of circuit analysis Superposition method of circuit analysis Equivalent circuit idea (Thevenin, Norton) Maximum power transfer from a circuit to a load To stop
More informationUnit 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
More informationUnit-1(A) Circuit Analysis Techniques
Unit-1(A Circuit Analysis Techniques Basic Terms used in a Circuit 1. Node :- It is a point in a circuit where two or more circuit elements are connected together. 2. Branch :- It is that part of a network
More informationClosed 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.
More information3. Voltage and Current laws
1 3. Voltage and Current laws 3.1 Node, Branches, and loops A branch represents a single element such as a voltage source or a resistor A node is the point of the connection between two or more elements
More informationEE 105 Discussion #1: Fundamentals of Circuit Analysis
EE 105 Discussion #1: Fundamentals of Circuit Analysis 1.1 Ohm s Law V = ir i = V/R 1.2 KCL & KVL Kirchoff s Current Law (KCL) Kirchoff s Voltage Law (KVL) The algebraic sum of all currents entering a
More informationV =! " Ir. Resistors in series! Ch 28-DC Circuits! EMF & Terminal Voltage!
Ch 28-DC Circuits! Resistors in series! One of the bits of nastiness about DC circuits is that they can be disguised to look like something they are not. Look at the circuit on the left. Its general form
More informationA 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
More informationElectromagnetism 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
More informationLab #2 Voltage and Current Division
In this experiment, we will be investigating the concepts of voltage and current division. Voltage and current division is an application of Kirchoff s Laws. Kirchoff s Voltage Law Kirchoff s Voltage Law
More informationLightbulbs 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.
More informationBook 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.
More informationUnit 8 Combination Circuits
Unit 8 Combination Circuits Objectives: Define a combination circuit. List the rules for parallel circuits. List the rules for series circuits. Solve for combination circuit values. Characteristics There
More informationChapter 8. Constant Current Sources
Chapter 8 Methods of Analysis Constant Current Sources Maintains same current in branch of circuit Doesn t matter how components are connected external to the source Direction of current source indicates
More informationExperiment #3 Kirchhoff's Laws
SAN FRANCSC STATE UNVERSTY ELECTRCAL ENGNEERNG Kirchhoff's Laws bjective To verify experimentally Kirchhoff's voltage and current laws as well as the principles of voltage and current division. ntroduction
More information30V 30 R1 120V R V 30 R1 120V. Analysis of a single-loop circuit using the KVL method
Analysis of a singleloop circuit using the KVL method Below is our circuit to analyze. We shall attempt to determine the current through each element, the voltage across each element, and the power delivered
More informationPHYS102 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
More informationExample: In the given circuit: (a) How much power is drawn from the battery? (b) How much current flows through each resistor? And in what direction?
0.8 Circuits Wired Partially in Series and Partially in Parallel Example: n the given circuit: (a) How much power is drawn from the battery? (b) How much current flows through each resistor? And in what
More informationCHAPTER 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
More informationDirect 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
More informationEN วงจรไฟฟ าและอ เล กทรอน กส Circuits and Electronics บทท 2 พ นฐานวงจรไฟฟ า
EN2042102 วงจรไฟฟ าและอ เล กทรอน กส Circuits and Electronics บทท 2 พ นฐานวงจรไฟฟ า สาขาว ชาว ศวกรรมคอมพ วเตอร คณะว ศวกรรมศาสตร มหาว ทยาล ยเทคโนโลย ราชมงคลพระนคร INTRODUCTION Two types of current are readily
More informationChapter 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
More informationDC 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
More informationCK-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
More informationObjective 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
More informationELECTRIC CIRCUITS PREVIEW QUICK REFERENCE. Important Terms
ELECTRC CRCUTS PREEW Conventional current is the flow of positive charges though a closed circuit. The current through a resistance and the voltage which produces it are related by Ohm s law. Power is
More informationLab #5 ENG RC Circuits
Name:. Lab #5 ENG 220-001 Date: Learning objectives of this experiment is that students will be able to: Measure the effects of frequency upon an RC circuit Calculate and understand circuit current, impedance,
More informationChapter 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
More informationCharge 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)
More informationV (in volts) = voltage applied to the circuit, I (in amperes) = current flowing in the circuit, R (in ohms) = resistance of the circuit.
OHM S LW OBJECTIES: PRT : 1) Become familiar with the use of ammeters and voltmeters to measure DC voltage and current. 2) Learn to use wires and a breadboard to build circuits from a circuit diagram.
More informationChapter 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
More informationPrelab 4 Millman s and Reciprocity Theorems
Prelab 4 Millman s and Reciprocity Theorems I. For the circuit in figure (4-7a) and figure (4-7b) : a) Calculate : - The voltage across the terminals A- B with the 1kΩ resistor connected. - The current
More informationName: 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.
More informationThevenin Equivalent Circuits: (Material for exam - 3)
Thevenin Equivalent Circuits: (Material for exam 3) The Thevenin equivalent circuit is a two terminal output circuit that contains only one source called E TH and one series resistors called R TH. This
More informationThe 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
More informationI = 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
More information1 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
More informationSurvival Skills for Circuit Analysis
P. R. Nelson Fall 2010 WhatToKnow - p. 1/46 Survival Skills for Circuit Analysis What you need to know from ECE 109 Phyllis R. Nelson prnelson@csupomona.edu Professor, Department of Electrical and Computer
More informationMeasurement of Resistance and Potentiometers
Electrical Measurements International Program Department of Electrical Engineering UNIVERSITAS INDONESIA Measurement of Resistance and Potentiometers Jahroo Renardi Lecturer : Ir. Chairul Hudaya, ST, M.Eng.,
More informationThe sum of the currents entering a circuit junction is equal to the sum of the currents leaving the junction.
By substituting the definition for resistance into the formula for conductance, the reciprocal formula for resistance in parallel circuits is obtained: In parallel circuits, there are junctions where two
More informationExplain mathematically how a voltage that is applied to resistors in series is distributed among the resistors.
Objective of Lecture Explain mathematically how a voltage that is applied to resistors in series is distributed among the resistors. Chapter.5 in Fundamentals of Electric Circuits Chapter 5.7 Electric
More informationThe 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
More information10 Electromagnetic Interactions
Lab 10 Electromagnetic Interactions What You Need To Know: The Physics Electricity and magnetism are intrinsically linked and not separate phenomena. A changing magnetic field can create an electric field
More informationCircuits 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,
More informationOhm 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
More informationElectrical Measurements
Electrical Measurements. OBJECTIES: This experiment covers electrical measurements, including use of the volt-ohmmeter and oscilloscope. Concepts including Ohm's Law, Kirchoff's Current and oltage Laws,
More informationResistors 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
More informationLab #1: Electrical Measurements I Resistance
Lab #: Electrical Measurements I esistance Goal: Learn to measure basic electrical quantities; study the effect of measurement apparatus on the quantities being measured by investigating the internal resistances
More informationCHAPTER 2 PROBLEMS 12V V 2. Fig. 2.1 I 1. 9mA I 0. Fig Find the resistance of the network in Fig. 2.3 at the terminals A-B. Fig. 2.
7 CHPTER PROLEMS.1 Determine the voltages and V in the networ in Fig..1 using voltage division. 1V Ω Ω Ω Ω V Fig..1. Find the currents 1 and 0 in the circuit in Fig.. using current division. Ω Ω 1 Ω 1Ω
More informationENGR 1181 Lab 3: Circuits
ENGR 1181 Lab 3: Circuits - - Lab Procedure - Report Guidelines 2 Overview of Circuits Lab: The Circuits Lab introduces basic concepts of electric circuits such as series and parallel circuit, used in
More informationSeries 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).
More informationPhysicsAndMathsTutor.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
More informationQUESTION BANK ETE (17331) CM/IF. Chapter1: DC Circuits
QUESTION BANK ETE (17331) CM/IF Chapter1: DC Circuits Q1. State & explain Ohms law. Also explain concept of series & parallel circuit with the help of diagram. 3M Q2. Find the value of resistor in fig.
More information10Vdc. Figure 1. Schematics for verifying Kirchhoff's Laws
ECE 231 Laboratory Exercise 2 Laboratory Group (Names) OBJECTVE Verify Kirchhoff s voltage law Verify Kirchhoff s current law Gain experience in using both an ammeter and voltmeter Construct two (2) circuits
More informationElectrical 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
More informationEEE 2101 Circuit Theory I - Laboratory 1 Kirchoff s Laws, Series-Parallel Circuits
ame & Surname: D: Date: EEE 20 Circuit Theory - Laboratory Kirchoff s Laws, Series-Parallel Circuits List of topics for this laboratory: Ohm s Law Kirchoff s Current Law(KCL) Kirchoff s Voltage Law(KVL)
More informationOhm's Law and the Measurement of Resistance
Ohm's Law and the Measurement of Resistance I. INTRODUCTION An electric current flows through a conductor when a potential difference is placed across its ends. The potential difference is generally in
More informationConfigurations of Resistors
Configurations of Resistors Safety and Equipment Multimeter with probes or banana leads. Two of 50Ω and one of 100Ω resistors 5 connecting wires with double alligator clips Introduction There are two basic
More informationLab 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
More informationELECTRIC 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
More informationTable of Contents...2. About the Tutorial...6. Audience...6. Prerequisites...6. Copyright & Disclaimer EMI INTRODUCTION Voltmeter...
1 Table of Contents Table of Contents...2 About the Tutorial...6 Audience...6 Prerequisites...6 Copyright & Disclaimer...6 1. EMI INTRODUCTION... 7 Voltmeter...7 Ammeter...8 Ohmmeter...8 Multimeter...9
More informationStrand G Unit 3: Electrical Circuits. Introduction. Learning Objectives. Introduction. Key Facts and Principles.
Learning Objectives At the end of this unit you should be able to; Represent an electrical circuit using a circuit diagram. Correctly identify common components in a circuit diagram. Calculate current,
More informationDC 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
More informationChapter two. Basic Laws. 2.1 Introduction
2.1 Introduction Chapter two Basic Laws Chapter 1 introduced basic concepts in an electric circuit. To actually determine the values of these variables in a given circuit requires that we understand some
More informationResistance and Ohm s Law
Resistance and Ohm s Law Textbook pages 290 301 Section 8.3 Summary Before You Read Do you think electrons can move through all conducting substances equally well? Give your reasons why or why not on the
More informationQ3.: 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
More information