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10. An electric power station that operates at 25 kV and uses a 10:1 step-up ideal transformer is producing 360 MW (Mega-Watt

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Answer #1

Voltage, V = 10 x 25 = 2.5 x 10^5 V

Current, I = P/V = 360 x 10^6/2.5 x 10^5 = 1440 A

Power loss = I^2 R = 0.03 x 360

Resistance, R = (0.03 x 360 x 10^6)/1440^2 = 5.208 ohm

Resistance, R = pL/A = pL/(pi/4) d^2

d^2 = (1.72 x 10^-8 x 2 x 230000)/(pi/4) x 5.208

d = 4.40 cm

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