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

Question

Quizplus · Accepted Answer

The voltage is doubled in the secondary coil, which means the ratio of the number of turns in the secondary coil to those in the primary coil is 2:1. Therefore, the ratio of the number of turns in the primary coil to those in the secondary coil is the inverse or reciprocal of 2:1, which is 1:2.

A Step-Up Transformer Doubles a Primary Voltage 110 V (Ac)