33) Which method of speed control of 3 phase induction motor above and below normal speed can be obtained?

By rotor rheostat control

By changing applied voltage

By injecting EMF in rotor circuit

By changing the number of stator poles

Answer is:

By changing applied voltage

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:

Phase relation

Phase sequence

Single phasing

Phase distortion

Answer is: