An average of 120KW of electric power is sent to a small town from a power plant constant 10km away.the transmission lines have a total resistance of 0.4ohms, calculate the power loss if the is transmitted at 240v.

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  1. i^2 R
    i = V/R = 240/0.4

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  2. E*I = 120,000 W.
    240I = 120,000,
    I = 500A.

    P = I^2 * R = 500^2 * 0.4 = 100,000W = 100 kW. = power lost.

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