Electrical Machines
A smaller air gap in a induction motor helps to

 reduce the magnetizing current.
 increase the starting torque.
 reduce the chance of crawling.
 reduce the chance of cogging.

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Electrical Machines
If the frequency of input voltage of a transformer is increased keeping the magnitude of voltage unchanged, then

 Ph will decrease but Pe will remain same
 both hysteresis loss(Ph) and eddy current loss(Pe) will increase
 Pe will increase but Ph will decrease
 Ph will increase but Pe will decrease

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