Red Seal Electrician Practice
MotorsQuestion 1297 of 1506

How does a capacitor-run motor differ from a capacitor-start motor?

  1. A smaller capacitor stays in circuit after starting.
  2. A larger capacitor stays in the circuit after the motor has started.
  3. It has no auxiliary winding in the stator.
  4. The capacitor is connected in the rotor circuit.
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Correct answer: A smaller capacitor stays in circuit after starting.

A large capacitor gives starting torque. A smaller one then improves running without too much current.

Source: Lessons in Electric Circuits II: AC (Kuphaldt), 13.9: Single-phase Induction Motors

Practice motors

Questions last reviewed: 18 October 2026