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) 4500
B) 5
C) 7500
D) 200

Question

Quizplus · Accepted Answer

The transformer equation relating the number of turns in the primary (Np) to the number of turns in the secondary (Ns) is given by the ratio of the secondary voltage (Vs) to the primary voltage (Vp), i.e., Vs/Vp = Ns/Np. Given Vp = 120V, Vs = 4500V, and Np = 200 turns, we can solve for Ns: 4500/120 = Ns/200, which gives Ns = 4500*200/120 = 7500 turns.

A Generator Produces 60 a of Current at 120 V