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

JAMB 2000

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

A. 80.0W
B. 40.0W
C. 10.0W
D. 0.1W

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Correct Answer: Option 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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An electric generator with a power output of 3.0KW at a voltage of 1.5KV distributes...

Correct Answer: Option A

Explanation

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