Assume that an isolation transformer has 240 turns of wire on the primary and 60 turns of wire on the secondary. This is a ratio of 4:1 (240/60 = 4). Now assume that 120 V is connected to the primary winding. The voltage of the secondary winding is ____V.
A) 25
B) 30
C) 240
D) 480

Question

Quizplus · Accepted Answer

The voltage ratio is the same as the turns ratio, so the secondary voltage is 120V / 4 = 30V. Therefore, the answer is choice B.

Assume That an Isolation Transformer Has 240 Turns of Wire