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### EEE :: Parallel Circuits

1. An ammeter has an internal resistance of 50 . The meter movement itself can handle up to 1 mA. If 10 mA is applied to the meter, the shunt resistor, RSH1, is approximately

2.  A. 55 B. 5.5 C. 50 D. 9

3. The total resistance of a parallel circuit is 50 . If the total current is 120 mA, the current through the 270 resistor that makes up part of the parallel circuit is approximately

4.  A. 22 mA B. 120 mA C. 220 mA D. 50 mA

5. The currents into a junction flow along two paths. One current is 4 A and the other is 3 A. The total current out of the junction is

6.  A. 1 A B. 7 A C. unknown D. the larger of the two

7. When an additional resistor is connected across an existing parallel circuit, the total resistance

8.  A. remains the same B. decreases by the value of the added resistor C. increases by the value of the added resistor D. decreases

9. When a 1.6 k resistor and a 120 resistor are connected in parallel, the total resistance is

10.  A. greater than 1.6 k B. greater than 120 but less than 1.6 k C. less than 120 but greater than 100 D. less than 100

11. If there are a total of 120 mA into a parallel circuit consisting of three branches, and two of the branch currents are 40 mA and 10 mA, the third branch current is

12.  A. 50 mA B. 70 mA C. 120 mA D. 40 mA

13. Three lights are connected in parallel across a 120 volt source. If one light burns out,

14.  A. the remaining two will glow dimmer B. the remaining two will glow brighter C. the remaining two will not light D. the remaining two will glow with the same brightness as before

15. Four equal-value resistors are connected in parallel. Ten volts are applied across the parallel circuit and 2 mA are measured from the source. The value of each resistor is

16.  A. 12.5 B. 200 C. 20 K D. 50

17. A set of Christmas tree lights is connected in parallel across a 110 V source. The filament of each light bulb is 1.8 k. The current through each bulb is approximately

18.  A. 610 mA B. 18 mA C. 110 mA D. 61 mA

19. The power dissipation in each of four parallel branches is 1.2 W. The total power dissipation is

20.  A. 1.2 W B. 4.8 W C. 0.3 W D. 12 W