Electrical Machines The speed of rotation of 5th harmonic component in the stator of an induction motor is 0.5 times the synchronous speed. (1 / 5) times the synchronous speed. 5 times the synchronous speed. (1 / 15) times the synchronous speed. 0.5 times the synchronous speed. (1 / 5) times the synchronous speed. 5 times the synchronous speed. (1 / 15) times the synchronous speed. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines No load test of 3-phase induction motor gives which of the following? constant loss variable loss both A and B None of these constant loss variable loss both A and B None of these ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines What is the frequency of a alternator, if P = number of poles and N = revolution made per second? 120 / PN Hz. 120P / N Hz. PN / 2 Hz. 120N / P Hz. 120 / PN Hz. 120P / N Hz. PN / 2 Hz. 120N / P Hz. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines A shunt generator is running at 1000 rpm. If flux is reduced by half, then what is the new speed? 500. 0. 2000. 1000. 500. 0. 2000. 1000. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The residual magnetism of a self-excited dc generator is lost. To build up its emf again the field winding must be replaced the field winding connection must be reversed field winding must be excited by low voltage dc supply the armature connection must be reversed the field winding must be replaced the field winding connection must be reversed field winding must be excited by low voltage dc supply the armature connection must be reversed ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Armature reaction of an unsaturated DC machine is crossmagnetising. magnetising. none of above. demagnetising. crossmagnetising. magnetising. none of above. demagnetising. ANSWER DOWNLOAD EXAMIANS APP
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