The back emf in an electric motor is its maximum value under which condition?
A)motor speed is zero
B)current is a maximum
C)voltage is a maximum
D)motor speed is a maximum

Question

Quizplus · Accepted Answer

The maximum back emf in an electric motor occurs when the motor speed is a maximum. This is because the back emf is directly proportional to the speed of the motor. As the motor speed increases, the back emf also increases, eventually reaching its maximum value at the maximum speed of the motor.

The Back Emf in an Electric Motor Is Its Maximum