1. A B C D 10. A B C D 19. A B C D 2. A B C D 11. A B C D 20. A B C D 3. A B C D 12. A B C D 21. A B C D 4. A B C D 13. A B C D 22.

Transcription

1 NYT MT 1150 lectrical ircuit Uniform Final Spring2015 Please submit this page with your answer and question sheets Must circle the correct answer on the answer sheet

2 1. Which of the following is voltage source? 2. apacitor is measured in Watts Ohms Farads Henries 3. What is 1,780.5 kj in engineering notation? x 10 6 J x 10 4 J x 10 3 J MJ 4. Thevenin s Theorem can be applied only to: esistive circuits apacitive circuits 5. ased on 4 band resistor color chart, find the value and tolerance in which a resistor has the following color bands to satisfy the manufacturer s tolerance 1 st band 2 nd band 3 rd band 4 th band red brown yellow gold 214k Ohm ±5% 120k Ohm x 5% 210k Ohm ±5% 2100 Ohm x5% 4 band resistor color chart color and value tolerance lack 0 rown 1 1% ed 2 2% Orange 3 3% Yellow 4 4% Green 5 0.5% lue % Gold 5% Silver 10% 6. student measures resistance with a igital Mutimeter (Volt/mp/Ohm Meter). He places this Mutimeter on an ohmmeter setting x200kω. Then he takes a resistor with the following color bands: 1 st band 2 nd band 3 rd band 4 th band brown black yellow gold Which value is correct for his Ohmmeter reading to satisfy the manufacturer s tolerance? In your test procedure, show your work how you decide the correct answer (refer to 4 band resistor color chart above) 200 kω 98.2 kω 92.5 kω Inductive ircuits 109 kω ll of the above 1

3 7. esistors of = 10kΩ, = 1kΩ, = 1kΩ, = 10kΩ are connected in combinational circuit to a 12 Volt supply. hoose correct answer. is in series with is in parallel with is in series with is in parallel with 11. Is = 3.5 m. You measured I2 to be 1 m. What is current I1? 1.5 m 2.0m 2.5m 6 Is I1 I2 12. For the network, = 3.0 kω, = 3.0 kω, = 6.0 kω, = 6.0 kω. What is the total resistance between and? 2.0 kω 9.0 kω 8. Find the voltage V 1 for the network below 2V 4V 6V 24V V1 8kΩ 30 V 2kΩ V2 1.5 kω 3.0kΩ 13. voltage source = 6.0V, two resistors are equal =, =, and the voltage between and (V3 across and ) is 2.2V. What are the voltage V1 and V2? V1 V2 9. How much resistance is needed to limit the current from a = 110V source to 20m? 5.5kΩ 20 m 550Ω 55 kω V3 550 kω V1=3.8V, V2=3.8V V1=1.1V, V2=1.1V 10. etermine current I 1 for the circuit below Is=8 I1 8Ω I2 24Ω V1=1.9V, V2=3.8V V1=1.9V, V2=1.9V Show your work here 2

4 14. ssume a resistor is rated for 2W (2 Watts). What is the maximum voltage can be applied to the resister to without exceeding its power rating. 110V 20 m 220 V 100 V 40 V 17. For the network below, =9MΩ,the total resistance (T = //) is 6MΩ, and the power dissipated by is 81kW. What is the resistance of 2? 3 MΩ 6 MΩ 9 MΩ 18 MΩ T = 6MΩ 15. Three equal resistors of 1000 ohms each ( = = ) are connected in series to a =60V power supply. If one of the resistors is shorted, the total resistance and current is: 3kΩ, 20 m 18. L1 = 4.0 mh, L2 = 2.0 mh, L3 =1.0 mh. What is the total inductance between and? 7.0 mh 1,7 mh 1kΩ, 60 m 2kΩ, 30 m 3.0 mh 4.7 mh 1.5kΩ,40 m 16. For the network below, what is the voltage source that has to be applied to this circuit? 30 V 21 V 21 mv 30 mv 19. Three capacitors, namely 1 =3µF, 2 =2µF, and 3 = 20µF, are connected to =50volt supply. What is the voltage across 20µF capacitor 3? 50 V 2 40 V 10 V 6.3 V 1 3 1m V1 V2 Show your work here. = 8kΩ = 1kΩ V3 P3=21mW 3

5 20. For the sinusoidal signal, the time period of the waveform is 4ms as shown in Figure, what is the frequency of the waveform? 0.25 khz 1 khz 4 khz 10 khz 23. = = 2.0 kω, = 1.5 kω, = 2.5 kω, and =10.0 V. What is the current through? 1.0 m 5m 2.0m 4.0m 21. Given the current source in a circuit i(t) = 100 sin(120πt) (m), where t is a time in the unit of ms. What is the amplitude of the current? 200m Show your work here. You can use a calculator. 100m 70.7m 141.4m 22. = = 2.0 kω, = 1.5 kω, = 2.5 kω, and =10.0 V. What is the voltage V? 2.0V 5.0V 10V 2.5V Show your work here. You can use a calculator. 24. = = 2.2 kω, = 1.4 kω, = 3.5 kω, and =6.0 V. How much power is dissipated by resistor? 1.4mW 3.5mW 1.1mW 2.2mW Show your work here. You can use a calculator. 4

6 25. What is the Thevenin voltage V th in the Thevenin equivalent circuit for the network external to the resistor for the network below?. 5 V 26. What is the th in the Thevenin equivalent circuit for the network external to the resistor for the network below?. 3.6 Ω. 20 V 8 V V 9Ω 20 V 6Ω 3Ω a b. 6.6 Ω. 6.0 Ω. 9 Ω 9Ω 20 V 6Ω 3Ω a b Show your work here including Thevenin equivalent circuit. You can use a calculator. Show your work here including Thevenin equivalent circuit. You can use a calculator. 5