An electric power station that operates at 15 kV and uses a 20:1 step-up ideal transformer is producing 370 MW (Mega-Watt) of power that is to be sent to a big city which is located 240 km away with only 2.5% loss. Each of the two wires are made of copper (resistivity = 1.68×10−81.68×10−8 Ω.m). What is the diameter of the wires?

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Asked Mar 6, 2019
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An electric power station that operates at 15 kV and uses a 20:1 step-up ideal transformer is producing 370 MW (Mega-Watt) of power that is to be sent to a big city which is located 240 km away with only 2.5% loss. Each of the two wires are made of copper (resistivity = 1.68×1081.68×10−8 Ω.m). What is the diameter of the wires?

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Expert Answer

Step 1

The voltage that is sent is,

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Step 2

The current using the equation for power is, 

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Step 3

The resistance of the wire if...

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