PARALLEL CIRCUITS QUIZ

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

is less than 600

is less than 1.2 k

is less than 6 k

is greater than 1.2 k

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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

48 W

1.5 W

72 W

18 W

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Five 100 resistors are connected in parallel. If one resistor is removed, the total resistance is

100

500

20

25

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

the remaining two will glow brighter

the remaining two will glow with the same brightness as before

the remaining two will glow dimmer

the remaining two will not light

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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

25 mA

100 mA

200 mA

6.25 mA

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A 470 resistor, a 220 resistor, and a 100 resistor are all in parallel. The total resistance is approximately

470

30

790

60

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

0.3 W

12 W

1.2 W

4.8 W

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

decreases

remains the same

increases by the value of the added resistor

decreases by the value of the added resistor

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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

137 mA

1.8 A

2.2 A

9.09 A

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