Electrical Machines A small air gap in poly phase induction motor helps to reduce chance of crawling. reduce magnetizing current. increase starting torque. reduce chance of cogging. reduce chance of crawling. reduce magnetizing current. increase starting torque. reduce chance of cogging. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines A dc shunt generator, when commissioned after a major repair of the field system, failed to build Up voltage. It was because field winding was wrongly connected there was a break in the armature circuit field resistance was higher than critical resistance field system lost residual magnetism field winding was wrongly connected there was a break in the armature circuit field resistance was higher than critical resistance field system lost residual magnetism ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines A 220 V DC machine has an armature resistance 1Ω. If the full load current is 20 A, the difference of induced voltage and generator is 40 V. 0 V. 20 V. 60 V. 40 V. 0 V. 20 V. 60 V. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In DC generator, brushes are always placed along armature axis. magnetic neutral axis. geometrical neutral axis. load axis. armature axis. magnetic neutral axis. geometrical neutral axis. load axis. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines A Shunt generator running at 1000 rpm has generated emf of 100 V. If the speed increases to 1200 rpm, the generated emf will be nearly 140 V 175 V 120 V 240 V 140 V 175 V 120 V 240 V ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Which of the following represents the operating region of slip in a 1-phase induction motor? 0 < S < 2 -2 < S < 2 0 < S < 1 -1 < S < 1 0 < S < 2 -2 < S < 2 0 < S < 1 -1 < S < 1 ANSWER DOWNLOAD EXAMIANS APP
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