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Parallel Circuits

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

790
470
60
30

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Parallel Circuits
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

1.5 W
18 W
72 W
48 W

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Parallel Circuits
In a five-branch parallel circuit, there are 12 mA of current in each branch. If one of the branches opens, the current in each of the other four branches is

3 mA
48 mA
0 A
12 mA

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Parallel Circuits
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
2.2 A
137 mA
1.8 A

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

decreases
increases
remains the same
doubles

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

an open resistor
an increase in source voltage
a drop in source voltage
either a drop in source voltage or an open resistor

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