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An electric generator with a power output of 3 ... - JAMB Physics 2000 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
A
80.0W
B
40.0W
C
10.0W
D
0.1W
correct option: a

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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