Electrical Machines In field flux method speed control of DC Motor is constant hp drive below the base speed. constant torque drive below the base speed. constant torque drive above the base speed. constant power drive above base speed. constant hp drive below the base speed. constant torque drive below the base speed. constant torque drive above the base speed. constant power drive above base speed. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Maximum efficiency will occur, when copper loss is_______to iron loss? any of the above greater than equal to less than any of the above greater than equal to less than ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines For high current and low current rating which winding is employed to DC machine? Wave winding Lap winding None of above Both lap and wave winding Wave winding Lap winding None of above Both lap and wave winding ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Which of following components of a DC generator plays vital role for providing direct electric current of a DC generator? Eye bolt. Commutator. Equalizer rings. Dummy coils. Eye bolt. Commutator. Equalizer rings. Dummy coils. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines A synchronous machine has P number of poles, find the relation between electrical angular momentum (ωe) and mechanical angular momentum (ωm)? ωe = P/2*ωm ωe = 2/P*ωm ωe = P*ωm ωe = ωm ωe = P/2*ωm ωe = 2/P*ωm ωe = P*ωm ωe = ωm ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In a synchronous machine, if the field flux axis is ahead of the armature field axis in the direction of rotation, the machine operating is asynchronous generator. synchronous motor. synchronous generator. asynchronous motor. asynchronous generator. synchronous motor. synchronous generator. asynchronous motor. ANSWER DOWNLOAD EXAMIANS APP
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