Red Seal Electrician Practice
MotorsQuestion 1258 of 1506

A load torque goes above the breakdown torque of an induction motor. What happens?

  1. The motor speeds up.
  2. The slip drops to zero.
  3. The motor stalls.
  4. The efficiency rises.
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Correct answer: The motor stalls.

The motor cannot make more torque than its breakdown value, so it falls to a stop.

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

Practice motors

Questions last reviewed: 18 October 2026