Correct statement among the given:
1
Cogging tendency can be overcome by making the number of rotor slots equal to the number of stator slots.
2
Cogging tendency can be reduced by skewing the rotor bars.
3
the tendency of squirrel cage induction motor to run at one-seventh of the synchronous speed is when connected to supply is called Cogging.
4
Cogging effect may be eliminated or reduced by properly designing the rotor winding