32) Which method of speed control is only applicable for 3 phase slipring induction motor?

Casecade operation method

Rotor rheostat speed control

Changing the applied frequency method

Changing the number of stator poles method

Answer is:

Rotor rheostat speed control

By rotor rheostat control

By changing applied voltage

By injecting EMF in rotor circuit

By changing the number of stator poles

Answer is:

By cascade operation

By changing the applied voltage

By changing the supply frequency

By changing the number of stator poles

Answer is:

Voltage control

Cascade operation

Pole changing control

Supply frequency control

Answer is:

Equal currents with balanced loads

Different currents with balanced loads

Equal currents with unbalanced loads

Different currents with unbalanced loads

Answer is: