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Calculate the power across each 20 ohm resistance.

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in Basic Electrical Engineering by (88.7k points)
Calculate the power across each 20 ohm resistance.

(a) 1000W, 1000W

(b) 500W, 500W

(c) 1000kW, 1000kW

(d) 500kW, 500kW

I have been asked this question in quiz.

My question is based upon Power in section Simple DC Networks of Basic Electrical Engineering

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Correct choice is (b) 500W, 500W

The explanation is: This is a series connected circuit hence the current across each resistance is the same. To find current: I=V/R=200/20=5A.

To find power: P=I^2R=5^2*20=500W. Since both the resistors have a resistance of 20 ohms, the power across both is the same.

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