The mechanical power developed by a DC series motor is maximum when

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Electrical Engineering XYZ MCQ

The mechanical power developed by a DC series motor is maximum when:

  1. Back emf is equal to zero
  2. Back emf is equal to half the applied voltage
  3. Back emf is equal to applied voltage
  4. None of the above

Correct answer: 2. Back emf is equal to half the applied voltage

Explanation: The mechanical power developed by a dc motor maximum is maximum at the instant when Back emf is equal to half the applied voltage.

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