Red Seal Electrician Practice
TransformersQuestion 1110 of 1506

What does the voltage regulation of a power transformer describe?

  1. How well the secondary voltage stays constant as the load current changes
  2. How much the frequency changes as the load current changes
  3. How quickly the transformer warms up when it is loaded
  4. How much the primary voltage is allowed to vary from rated
Show answer

Correct answer: How well the secondary voltage stays constant as the load current changes

Good regulation means the secondary voltage drops little between no load and full load.

Source: Lessons in Electric Circuits II: AC (Kuphaldt), 10.6: Voltage Regulation

Practice transformers

Questions last reviewed: 18 October 2026