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An electric generator with a power output of 3.0KW at a voltage of 1.5KV distributes po...


Question

An electric generator with a power output of 3.0KW at a voltage of 1.5KV distributes power along cables of resistance 20.0Ω. The power loss in the cables is

Options

A) 80.0W

B) 40.0W

C) 10.0W

D) 0.1W


The correct answer is A.

Explanation:

Power input = 3KW = 3000W
Voltage = 1.5KV = 1500V
Current (I) = P/V = 3000/1500 = 2Amps.
∴ Power loss in the cables = I2R
= 2 x 2 x 20
= 80W

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