PARALLEL CIRCUITS QUIZ

Four 8 speakers are connected in parallel to the output of an audio amplifier. If the maximum voltage to the speakers is 12 V, the amplifier must be able to deliver to the speakers

72 W

1.5 W

48 W

18 W

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YOUR ANSWER : ?

Six resistors are in parallel. The two lowest-value resistors are both 1.2 k. The total resistance

is greater than 1.2 k

is less than 1.2 k

is less than 6 k

is less than 600

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YOUR ANSWER : ?

In a certain three-branch parallel circuit, R1 has 12 mA through it, R2 has 15 mA through it, and R3 has 25 mA through it. After measuring a total of 27 mA, you can say that

R2 is open

R3 is open

the circuit is operating properly

R1 is open

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YOUR ANSWER : ?

Four resistors of equal value are connected in parallel. If the total voltage is 15 V and the total resistance is 600 , the current through each parallel resistor is

6.25 mA

200 mA

100 mA

25 mA

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YOUR ANSWER : ?

If one of the resistors in a parallel circuit is removed, the total resistance

increases

remains the same

doubles

decreases

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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

50 mA

70 mA

40 mA

120 mA

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A sudden increase in the total current into a parallel circuit may indicate

an open resistor

an increase in source voltage

either a drop in source voltage or an open resistor

a drop in source voltage

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Five light bulbs are connected in parallel across 110 V. Each bulb is rated at 200 W. The current through each bulb is approximately

9.09 A

1.8 A

2.2 A

137 mA

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YOUR ANSWER : ?

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

5.5

50

55

9

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YOUR ANSWER : ?

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

4.8 W

1.2 W

12 W

0.3 W

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