Red Seal Electrician Practice
MotorsQuestion 1302 of 1506

Why are shaded pole motors only made in small sizes?

  1. They need a three-phase supply to run.
  2. Their starting torque is very low.
  3. They have no stator winding at all.
  4. They can only run on a DC supply source.
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Correct answer: Their starting torque is very low.

Starting torque is very low, so they are only made in small sizes below 50 W.

Source: Lessons in Electric Circuits II: AC (Kuphaldt), 13.10: Other Specialized Motors

Practice motors

Questions last reviewed: 18 October 2026