Red Seal Electrician Practice
AC generationQuestion 218 of 1506

A machine is locked in step with the line. Its driver pushes the rotor ahead of the stator field. What does the machine do?

  1. It takes energy from the line like a motor
  2. It delivers energy like an alternator
  3. It loses its field and trips off the line
  4. It stops all current in the stator
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Correct answer: It delivers energy like an alternator

A rotor pushed ahead of the field gives power to the line. A rotor held back by a load takes power from it.

Source: Lessons in Electric Circuits II: AC (Kuphaldt), 13.2: Synchronous Motors

Practice ac generation

Questions last reviewed: 18 October 2026