Electrical Machines In a single phase transformer the magnitude of leakage reactance is twice that of resistance of both primary and secondary. With secondary short circuited, the input power factor is 1/3 1/√5 2/√5 1/√2 1/3 1/√5 2/√5 1/√2 ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In a star - delta starting of an IM resistance is inserted in the rotor. reduced voltage is applied to the stator. line voltage is 57.7 % of stator voltage. applied voltage per stator phase is 57.7 % of a line volt resistance is inserted in the rotor. reduced voltage is applied to the stator. line voltage is 57.7 % of stator voltage. applied voltage per stator phase is 57.7 % of a line volt ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines A 20KVA auto transformer, turn ratio is 0.8. Find the power transferred conductively? 0KVA 16KVA 20KVA 4KVA 0KVA 16KVA 20KVA 4KVA ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines To get the speed of DC motor is more than normal without wastage of electrical energy _____________ is used. Any of above method. Rheostatic control. Ward Leonard control. None of above. Any of above method. Rheostatic control. Ward Leonard control. None of above. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Cogging of induction motor occurs at high voltage and when stator and rotor poles are equal. low voltage and when stator and rotor poles are equal. high voltage and when stator and rotor poles are not equal. low voltage and when stator and rotor poles are not equal. high voltage and when stator and rotor poles are equal. low voltage and when stator and rotor poles are equal. high voltage and when stator and rotor poles are not equal. low voltage and when stator and rotor poles are not equal. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Torque angle of a synchorous machine operating from a constant voltage bus is usually defined as the space angle between Stator mmf wave and resultant mmf wave. Rotor mmf wave and resultant flux density wave. Rotor mmf wave and stator mmf wave. Stator mmf wave and resultant flux density. Stator mmf wave and resultant mmf wave. Rotor mmf wave and resultant flux density wave. Rotor mmf wave and stator mmf wave. Stator mmf wave and resultant flux density. ANSWER DOWNLOAD EXAMIANS APP
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