Electrical Machines The speed of stator rotating magnetic field (RMF) with respect to rotor is S.Ns Zero Ns Nr S.Ns Zero Ns Nr ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In a three phase star - delta transformer, what is the angle difference between primary and secondary phase voltages? Star side lags by -30°. Delta side leads by 30°. Star side leads by 30°. Delta side lags by -30°. Star side lags by -30°. Delta side leads by 30°. Star side leads by 30°. Delta side lags by -30°. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The current drawn by the a 230 V DC motor of armature resistance 0.5 Ω and back emf 200 V is 60 600 660 40 60 600 660 40 ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines At stand still condition the value of slip is 0 infinite value finite value 1 0 infinite value finite value 1 ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In induction motor when the length of the air gap is increased, the magnetizing current of the motor increases while the short circuit current __________________. kept constant to certain value. remains unchanged. decreased. increased. kept constant to certain value. remains unchanged. decreased. increased. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines If the load current and flux of a DC motor are held constant and voltage applied across it armature is increased by 5%, the speed of the motor will Reduce by 5%. Depends on other factor. Increase by 5%. Remain unchanged. Reduce by 5%. Depends on other factor. Increase by 5%. Remain unchanged. ANSWER DOWNLOAD EXAMIANS APP
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