a What is the power loss due to resistance in the line W b W

(a) What is the power loss due to resistance in the line?
W
(b) What fraction of the transmitted power does this loss represent?
%

Solution

a) The resistance of the power line

= 0.33 * 161 = 53.13 Ohm

Power loss = I² R = 53.13 * 990²

= 52 * 10⁶ W = 52 Million Watts

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b) The line carries = I * V = 990 * 730,000 = 723 Million Watts

52 / 723 = 7.19 % of the power is lost.