53) If the stator voltage and frequency of an induction motor are reduced proportionality, its

54) An induction motor has a shaft circuit current 7 times the full load current and a full load slip of 4 percent. Its line starting is _____ times the full load torque.

55) If stator voltage of a SCIM is reduced to 50 percent of its rated value, torque developed is reduced by _____ percent of its full load value.

56) A SCIM with 36-slot stator has two separate windings: one with 3 coil groups per phase per pole and the other with 2 coil groups per phase per pole. The obtainable two motor speeds would be in the ratio of

57) A 6 pole, 3-phase induction motor taking 25 kW from a 50 Hz supply is cumulatively cascaded to a 4-pole motor. Neglecting all losses, speed of the 4-pole motor would be ....... R.P.M