Red Seal Electrician Practice
AC generationQuestion 1269 of 1506

An induction motor is driven above synchronous speed by a wind turbine. What happens?

  1. It stalls, because the rotor passes the stator field.
  2. It draws more current from the line to hold its speed.
  3. It sends power into the line at negative slip.
  4. It turns into a synchronous motor on the same line.
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Correct answer: It sends power into the line at negative slip.

Above synchronous speed the slip is negative, so the machine sends energy to the line.

Source: Lessons in Electric Circuits II: AC (Kuphaldt), 13.7: Tesla Polyphase Induction Motors

Practice ac generation

Questions last reviewed: 18 October 2026