Electrical Machines In alternator, the rotary part is core. none of these. magnetic field poles. armature. core. none of these. magnetic field poles. armature. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Commutator in DC generator is used for collecting of current reduce losses increase efficiency convert AC armature current in to DC collecting of current reduce losses increase efficiency convert AC armature current in to DC ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines If the number of rotor slots is equal to number of stator slots, then motor refuses to start. Hence it is known as air gap. cogging. relative speed. crawling. air gap. cogging. relative speed. crawling. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines which of the following losses are negligible in blocked rotor test? iron loss mechanical loss copper loss both A and B iron loss mechanical loss copper loss both A and B ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines If residual magnetism of a shunt generator is destroyed accidentally it may be restored by connecting its shunt field to earth. in reverse. to a DC source. to an AC source. to earth. in reverse. to a DC source. to an AC source. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The reduced air gap results in an increase cost of operation. breaking torque. power factor. starting torque. cost of operation. breaking torque. power factor. starting torque. ANSWER DOWNLOAD EXAMIANS APP
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