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)1:4
B)4:1
C)2:1
D)1:2
E)1:8

Question

Quizplus · Accepted Answer

A step-up transformer increases voltage, which means the secondary coil must have more turns than the primary coil. If it doubles the voltage from 110 V to 220 V, the ratio of primary to secondary turns is 1:2, indicating the secondary has twice as many turns as the primary.

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