Question

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.

Answer 1

i^2 R
where
i = V/R = 240/0.4

Answer 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.