An AC power generator produces 100 A (rms)at 3600 V.The voltage is stepped up to 100,000 V by an ideal transformer,and the energy transmitted through a long-distance power line with a total resistance of 100 Ω.What is the rms current in the long-distance line?
A) 3.6 A
B) 1.0 A
C) 1000 A
D) 1.8 A

Question

Quizplus · Accepted Answer

The power on both sides of an ideal transformer is the same. The power on the primary side is P = IV = 100 A * 3600 V = 360,000 W. On the secondary side, with a voltage of 100,000 V, the current is I = P/V = 360,000 W / 100,000 V = 3.6 A.

An AC Power Generator Produces 100 a (Rms)at 3600 V