A transformer has a 240 V primary and a 60 V secondary. With a 5 ohm load connected, what is the primary current?
A) 2 A
B) 3 A
C) 7 A
D) 8 A

Question

Quizplus · Accepted Answer

The transformer's voltage ratio is 240V/60V = 4:1. This means the current ratio is the inverse, 1:4. With a 5 ohm load on the secondary, the secondary current is I = V/R = 60V / 5 ohms = 12A. Therefore, the primary current is 12A / 4 = 3A.

A Transformer Has a 240 V Primary and a 60