32.The rotor slots of induction motor are not exactly parallel to the shaft. Instead, they are given a skew shape. Why

for two main reasons.

1. The first reason is to make the motor run quietly by reducing magnetic hum and to decrease slot harmonics.

2. The second reason is to help reduce the locking tendency of the rotor. The rotor teeth tend to remain locked under the stator teeth due to direct magnetic attraction between the two. This happens when the number of stator teeth are equal to the number of rotor teeth