9) What is the rotor frequency of a 3 phase squirrel cage induction motor at the time of starting?

Equal to supply frequency

3 times less than supply frequency

3 times more than supply frequency

Root(3) times less than supply frequency

Answer is:

Equal to supply frequency

Direct connection from stator

Due to back emf produced in stator

Direct connection to rotor from supply

By the transformer action of stator and rotor

Answer is:

Cascade operation

Changing applied voltage

Changing applied frequency

Changing the number of poles

Answer is:

Copper loss

Friction loss

Hysteresis loss

Eddy current loss

Answer is:

To dry the varnish quickly in winding

To easy flow of varnish in the winding

To increase the insulation resistance value

To drive out the moisture in between winding layers

Answer is: