For the transmission of electric power from power plant to home, as depicted in Fig. 21-25, where the electric power sent by the plant is 100 kW, about how far away could the house be from the power plant before power loss is 50%? Assume the wires have a resistance per unit length of 5 x 10-5 Ω/m.

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High voltage transmission line Step-down transformer Step-down (substation) transformer Power plant Step-up transformer Home 240,000 V 7200 V 240 V 12,000 V