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suppose that the power used by a light bulb in a circuit is 16 W, and the bulb has a resistance of 4 ohms. Calculate the current (in amps) flowing through it.

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Answer:

2 A

Explanation:

The power flowing in a circuit is given by;

P= I^2 R

Where;

I= current = the unknown

R= resistance= 4 ohms

P= power=16 W

I= √P/R

I= √16/4

I= 2 A

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