Answer / scb19422000

Because the difference between the applied voltage and the
back emf is more than normal in both the cases,as with
lower applied voltage the speed will be less due to higher
slip hence lower back emf.

Answer / prakash

In induction motor torque is directly proportional to square of current. Therefore if voltage is less than to maintain torque slip is increases , impedance decreases and current increases also when voltage increases than all magnetizing component of current increases so current increases.

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