Electrical Machines The magnetic field which initially induces emf in the armature in a self excited DC generator is because of residual magnetism. armature reaction. None of these permanent magnets. residual magnetism. armature reaction. None of these permanent magnets. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In a 12 pole triplex lap wound DC armature, each conductor can carry current of 100 A. The rated current of this armature is 600 A. 1200 A. 2400 A. 3600 A. 600 A. 1200 A. 2400 A. 3600 A. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Compensating winding are used to rectify the flux density waveform at None of these interpole region. region under main pole. throughout the air gap. None of these interpole region. region under main pole. throughout the air gap. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Resistance commutation is used generally in case of DC machines above 10 kW. None of these fractional kW DC machines. DC machines bellow 5 kW. DC machines above 10 kW. None of these fractional kW DC machines. DC machines bellow 5 kW. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines DC generator will not build up voltage if it has lost residual magnetism. any one of above. if field resistance is more than critical resistance. due to wrong direction of rotation. if it has lost residual magnetism. any one of above. if field resistance is more than critical resistance. due to wrong direction of rotation. ANSWER DOWNLOAD EXAMIANS APP
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