A generator produces 60 A of current at 120 V.The voltage is usually stepped up to 4500 V by an ideal transformer and transmitted through a power line of total resistance 1.0 Ω.Find the number of turns in the secondary if the primary has 200 turns.
A)5
B)200
C)4500
D)7500

Question

Quizplus · Accepted Answer

The number of turns in the secondary can be found using the transformer equation, which relates the primary and secondary voltages (Vp and Vs) to the number of turns in the primary (Np) and secondary (Ns) coils: Vs/Vp = Ns/Np. Given Vp = 120 V, Vs = 4500 V, and Np = 200 turns, solving for Ns gives Ns = (Vs/Vp) * Np = (4500/120) * 200 = 7500 turns.

A Generator Produces 60 a of Current at 120 V