Electrical Machines In a DC generator, if P be the number of poles and N be the rpm of the rotor, then frequency of magnetic reversals will be PN/2. PN/60. PN/3000. PN/120. PN/2. PN/60. PN/3000. PN/120. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines A 230 volt dc motor has an armature winding resistance of 0.5 ohm. Calculate the emf induced by the motor if the full load armature current is 23 ampere. 218.5 volt. None of these. 220.4 volt. 120 volt. 218.5 volt. None of these. 220.4 volt. 120 volt. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In star-delta starting of squirrel cage induction motor compared to DOL starting the starting current and torque are 1/√3, 1/√3 1/√3, 1/3 1/3, 1/3 1/3, 1/√3 1/√3, 1/√3 1/√3, 1/3 1/3, 1/3 1/3, 1/√3 ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Cross magnetization effects which of the following? both 2 and 3 commutation reduction in main field flux reduces the terminal voltage both 2 and 3 commutation reduction in main field flux reduces the terminal voltage ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines If the mechanical angle α between the stator and rotor poles increases, then the stator current Remains unchanged. Increases. Decreases. None of above. Remains unchanged. Increases. Decreases. None of above. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The slip of an induction motor normally does not depend on synchronous speed. rotor speed. shaft torque. core loss component. synchronous speed. rotor speed. shaft torque. core loss component. ANSWER DOWNLOAD EXAMIANS APP
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