Red Seal Electrician Practice
Power factor and three-phaseQuestion 1217 of 1506

How is the leading power factor of a synchronous condenser changed?

  1. By changing the supply frequency
  2. By adding more poles to the stator
  3. By varying the field excitation of the motor
  4. By changing the shaft speed
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Correct answer: By varying the field excitation of the motor

More or less field excitation sets how much reactive power it supplies or absorbs.

Source: Lessons in Electric Circuits II: AC (Kuphaldt), 13.3: Synchronous Condenser

Practice power factor and three-phase

Questions last reviewed: 18 October 2026