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

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 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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