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### EEE :: Series - Parallel Circuits

1. The internal resistance of a 20,000 ohm/volt voltmeter set on its 5 V range is

2.  A. 20,000 B. 100,000 C. 200,000 D. 1,000,000

3. Two 1.2 k resistors are in series and this series combination is in parallel with a 3.3 k resistor. The total resistance is

4.  A. 138 B. 1,389 C. 5,700 D. 880

5. The output of a certain voltage divider is 12 V with no load. When a load is connected, the output voltage

6.  A. decreases B. increases C. remains the same D. becomes zero

7. A certain voltage divider consists of two 12 k resistors in series. Which of the following load resistors will have the most effect on the output voltage?

8.  A. 1 M B. 24 k C. 18 k D. 12 k

9. A voltage divider consists of two 68 k resistors and a 24 V source. The unknown output voltage is

10.  A. 12 V B. 24 V C. 0 V D. 6 V

11. Three 10 k resistors are connected in series. A 20 k resistor is connected in parallel across one of the 10 k resistors. The voltage source is 24 V. The total current in the circuit is

12.  A. 900 A B. 9 mA C. 90 mA D. 800 A

13. A certain voltage divider consists of three 1 k resistors in series. Which of the following load resistors will have the least effect on the output voltage?

14.  A. 1 M B. 100 k C. 1 k D. 330

15. The parallel combination of a 470 resistor and a 1.5 k resistor is in series with the parallel combination of five 1 k resistors. The source voltage is 50 V. The percentage of the load current through any single 1 k resistor is

16.  A. 25% B. 20% C. 100% D. 50%

17. A certain Wheatstone bridge has the following resistor values: R1 = 10 k, R2 = 720 , and R4 = 2.4 k. The unknown resistance is

18.  A. 24 B. 2.4 C. 300 D. 3,000

19. On which of the following voltage range settings will a voltmeter present the minimum load on a circuit?

20.  A. 1 V B. 50 V C. 500 V D. 1,000 V