Electrical Machines In a DC generator if field winding attains the critical resistance machine will generate maximum power. the voltage generated will be zero. machine will generate maximum voltage. field winding will burn. machine will generate maximum power. the voltage generated will be zero. machine will generate maximum voltage. field winding will burn. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The stator core of a 3 - Φ induction motor is laminated in order to reduce the hysteresis loss. both of the above. eddy current loss. weight of the stator. hysteresis loss. both of the above. eddy current loss. weight of the stator. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The sparking at the the brushes, in a DC machines is due to armature reaction. high resistance of carbon brushes. reactance voltage. presence of commutator. armature reaction. high resistance of carbon brushes. reactance voltage. presence of commutator. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines If the excitation is reduced, the power factor is leading power factor unity power factor lagging power factor None of these leading power factor unity power factor lagging power factor None of these ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The shaft of induction motor may be unbalanced due to poor lubrication. uneven air gap. overheating of winding. overload. poor lubrication. uneven air gap. overheating of winding. overload. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Armature reaction effect is more in which of the following methods? field weakening method same in both methods None of these armature resistance control field weakening method same in both methods None of these armature resistance control ANSWER DOWNLOAD EXAMIANS APP
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