Red Seal Electrician Practice
MotorsQuestion 1301 of 1506

What gives a shaded pole motor its starting torque?

  1. A start capacitor in series with the main winding
  2. A shorted copper strap around part of each pole
  3. A centrifugal switch on the rotor shaft
  4. Slip rings on the rotor with a resistor
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Correct answer: A shorted copper strap around part of each pole

The strap makes a lagging flux, so the field rotates a little.

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

Practice motors

Questions last reviewed: 18 October 2026