Red Seal Electrician Practice
MotorsQuestion 1236 of 1506

Why are stepper motors rugged and low in cost?

  1. The rotor has no winding, slip rings or commutator.
  2. The stator has no laminations in its core.
  3. The motor has a built-in rotor position sensor and a small encoder.
  4. The motor only operates on 120 V AC line power.
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Correct answer: The rotor has no winding, slip rings or commutator.

A plain solid rotor has no parts to wear out.

Source: Lessons in Electric Circuits II: AC (Kuphaldt), 13.5: Stepper Motors

Practice motors

Questions last reviewed: 18 October 2026