Answer Posted / elvis luis

motors are machines which converts electrical energy to mechanical energy i.e it consumes electrical energy(supply source) and output is mechanical (torque) taken from the shaft output. motor,in case of induction motors, has a speed less than the synchronous speed and a positive slip. for a motor to run as a generator an external prime mover is used so that the motor is forcefully run above its synchronous speed. this allows the motor to run as a generator, in this case the motor now instead of consuming energy from the source starts feeding the source. a motor now acting as a generator has a negative slip.

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