An ideal step-up transformer doubles a primary voltage of 110 V. What is the ratio of the number of turns in its primary coil to the number of turns in the secondary coil?
A) 1:8
B) 2:1
C) 4:1
D) 1:2
E) 1:4

Question

Quizplus · Accepted Answer

The transformer doubles the primary voltage of 110 V, meaning the secondary voltage is 220 V. The ratio of the number of turns in the primary coil to the secondary coil for a step-up transformer is inversely proportional to the voltage ratio. Since the voltage is doubled, the turns ratio is 1:2.

An Ideal Step-Up Transformer Doubles a Primary Voltage of 110