Electrical Machines The armature voltage control is considered suitable for a DC motor driven at constant power. current. speed. torque. power. current. speed. torque. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Demagnetization effects which of the following? both B and C reduction in main field flux reduces the terminal voltage commutation both B and C reduction in main field flux reduces the terminal voltage commutation ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines If the applied voltage to a dc machine is 230 V, then the back emf, for maximum power developed, is 115 V 230 V 200 V 460 V 115 V 230 V 200 V 460 V ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The brushes of a DC machine should be placed on the armature midway between poles. commutator in the polar axis. commutator in the inter polar axis. armature in the polar axis. armature midway between poles. commutator in the polar axis. commutator in the inter polar axis. armature in the polar axis. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines A commutator in dc machine provide ----------------- rectification? full wave half wave half wave controlled full wave controlled full wave half wave half wave controlled full wave controlled ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines An induction motor having 8 poles runs at 727.5 rpm. If the supply frequency is 50Hz, the emf in the rotor will have a frequency of 1.5Hz 51.5Hz 2.5Hz 48.5Hz 1.5Hz 51.5Hz 2.5Hz 48.5Hz ANSWER DOWNLOAD EXAMIANS APP
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