Red Seal Electrician Practice
MotorsQuestion 1253 of 1506

What happens to the slip of an induction motor when the mechanical load increases?

  1. The slip decreases in proportion to the load.
  2. The slip stays constant and the voltage rises.
  3. The slip increases in proportion to the mechanical load.
  4. The slip becomes zero.
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Correct answer: The slip increases in proportion to the mechanical load.

More load needs more torque, so the rotor falls further behind the field.

Source: Lessons in Electric Circuits II: AC (Kuphaldt), 13.7: Tesla Polyphase Induction Motors

Practice motors

Questions last reviewed: 18 October 2026