Electrical Machines If residual magnetism of a shunt generator is destroyed accidentally it may be restored by connecting its shunt field to a DC source. to earth. to an AC source. in reverse. to a DC source. to earth. to an AC source. in reverse. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The armature of DC machine is made of silicon steel lamination to reduce both eddy current and hysteresis loss. increase the permeability. reduce hysteresis loss only. reduce eddy current loss only. reduce both eddy current and hysteresis loss. increase the permeability. reduce hysteresis loss only. reduce eddy current loss only. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The crawling in the induction motor is caused by improper design of stator laminations high loads harmonics developed in the motor low voltage supply improper design of stator laminations high loads harmonics developed in the motor low voltage supply ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines A three phase 400 V, 6 pole, 50 Hz, squirrel cage induction motor is running at a slip of 5%. The speed of stator magnetic field with respect to rotor magnetic field and speed of rotor w.r.t stator magnetic field are 1000 rpm, - 50 rpm. zero , - 50 rpm. 1000 rpm, 950 rpm. zero, 950 rpm. 1000 rpm, - 50 rpm. zero , - 50 rpm. 1000 rpm, 950 rpm. zero, 950 rpm. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Which of the following motor has more stability cylindrical motor salient pole motor None of these both motors has same stability cylindrical motor salient pole motor None of these both motors has same stability ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines If the number of rotor slots is equal to number of stator slots, then motor refuses to start. Hence it is known as air gap. crawling. relative speed. cogging. air gap. crawling. relative speed. cogging. ANSWER DOWNLOAD EXAMIANS APP
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