1.

If a 400 V, 50 hz star connected, 3-phase squirrel cage induction motor is operated from 400V and 75 Hz supply. The torque that the motor can now provide while drawing rated current from the supply will _________(a) reduce(b) increase(c) remains same(d) increases or reduces based on the rotor resistance.This question was posed to me by my college director while I was bunking the class.Origin of the question is Rotor EMF, Current and Power topic in portion Induction Machines of Electrical Machines

Answer»

Correct OPTION is (a) reduce

Explanation: The reactance will increase and so the TORQUE will DECREASE.



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