Red Seal Electrician Practice
TransformersQuestion 881 of 1506

A transformer has 200 primary turns and 50 secondary turns. The primary is at 600 V AC. What is the secondary voltage?

  1. 2400 V
  2. 400 V
  3. 150 V
  4. 12,000 V
Show answer

Correct answer: 150 V

Secondary voltage = 600 V × (50 / 200) = 150 V.

Source: Lessons in Electric Circuits I: DC (Kuphaldt), 14.6: Mutual Inductance

Practice transformers

Questions last reviewed: 18 October 2026