Red Seal Electrician Practice
MotorsQuestion 1306 of 1506

How is the torque of an eddy current clutch adjusted?

  1. By changing the shape of the rotor cage
  2. By changing the line frequency to the drive
  3. By adjusting the DC excitation of the stator coils
  4. By switching a capacitor in the circuit
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Correct answer: By adjusting the DC excitation of the stator coils

More DC excitation gives more torque, and the change is smooth.

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

Practice motors

Questions last reviewed: 18 October 2026