Electrical Machines Hopkinss test in DC motor is conducted at ? None of these. Full load. No load. Low load. None of these. Full load. No load. Low load. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In DC generator, which component plays the vital role to produce the direct current? Commutator. Armature. Yoke. Brush. Commutator. Armature. Yoke. Brush. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In dc machines, 1. reactance voltage is proportional to armature current 2.reactance voltage is proportional to core length 3.reactance voltage is due to self-flux of the coil undergoing commutation 4. armature-cross flux is neutralized by interpolar flux 5. interpolarmmf is more than armature mmf in the interpolar zone From these, the correct answer is 1, 3, 5 1, 2, 5 1, 2, 3, 4 2, 3, 4 1, 3, 5 1, 2, 5 1, 2, 3, 4 2, 3, 4 ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines For a given torque, reducing divertor resistance of a DC series motor Increase in speed demanding more armature current. Decrease in speed but armature current remains the same. Increase in speed but armature currnet remains the same. Decrease in speed demanding less armature current. Increase in speed demanding more armature current. Decrease in speed but armature current remains the same. Increase in speed but armature currnet remains the same. Decrease in speed demanding less armature current. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines A smaller air gap in a polyphase induction motor helps to increase the starting torque. reduce the chance of crawling. reduce the magnetizing current. reduce the chance of cogging. increase the starting torque. reduce the chance of crawling. reduce the magnetizing current. reduce the chance of cogging. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Which of the following generators are used in arc welding? cumulative compound generators differential compound generators series generators shunt generators cumulative compound generators differential compound generators series generators shunt generators ANSWER DOWNLOAD EXAMIANS APP
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