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A pair of power transmission lines each have 2.95-Ω resistance and carry 650 Amp. If the...

A pair of power transmission lines each have 2.95-Ω resistance and carry 650 Amp. If the primary voltage of the 10:1 step-up transformer is 2.2 kV, calculate the input voltage of the step-down transformer at the other end.

An electric power station that operates at 30 kV and uses a 10:1 step-up ideal transformer is producing 320 MW (Mega-Watt) of power that is to be sent to a big city which is located 200 km away with only 2.0% loss. Each of the two wires are made of copper (resistivity =  Ω.m). What is the diameter of the wires?

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