29) What is the effect of motor, if the rotor windings in slipring induction motor is open circuited at starting?

Will not run

Runs at slow speed

Runs at very high speed

Runs but not able to pull load

Answer is:

Will not run

By cascade operation

By rotor rheostat control

By injecting emf in rotor circuit

By changing the applied frequency

Answer is:

Casecade operation method

By changing the number of stator poles

By injection Emf in rotor circuit

By changing the supplied voltage

Answer is:

Casecade operation method

Rotor rheostat speed control

Changing the applied frequency method

Changing the number of stator poles method

Answer is:

By rotor rheostat control

By changing applied voltage

By injecting EMF in rotor circuit

By changing the number of stator poles

Answer is: