Red Seal Electrician Practice
MotorsQuestion 1283 of 1506

What does added rotor resistance do at start in a wound rotor motor?

  1. It raises both the starting current and the starting torque.
  2. It lowers both the starting current and the starting torque.
  3. It raises the starting current and lowers the starting torque.
  4. It lowers the starting current and raises the starting torque.
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Correct answer: It lowers the starting current and raises the starting torque.

The breakdown torque peak moves to zero speed, so high torque is made at start.

Source: Lessons in Electric Circuits II: AC (Kuphaldt), 13.8: Wound Rotor Induction Motors

Practice motors

Questions last reviewed: 18 October 2026