Electrical Machines On switching a DC motor to DC supply mains, it is found to rotate in the direction opposite to that for which it is designed. The DC motor is have an equal number of electrons and protons. Series shunt. Differentical compound. Cummulative compound. have an equal number of electrons and protons. Series shunt. Differentical compound. Cummulative compound. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines A 230 V, 50 Hz, 4 pole single phase induction motor is rotating in the clockwise ( forward ) direction at a speed of 1425 rpm. If the rotor resistance at standstill is 7.8 Ω. Then the effective rotor resistance in the backward branch of the equivalent circuit will be 2 Ω. 10 Ω. 4 Ω. 8 Ω. 2 Ω. 10 Ω. 4 Ω. 8 Ω. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines A three phase 400 V, 6 pole, 50 Hz, squirrel cage induction motor is running at a slip of 5%. The speed of stator magnetic field with respect to rotor magnetic field and speed of rotor w.r.t stator magnetic field are 1000 rpm, - 50 rpm. zero , - 50 rpm. zero, 950 rpm. 1000 rpm, 950 rpm. 1000 rpm, - 50 rpm. zero , - 50 rpm. zero, 950 rpm. 1000 rpm, 950 rpm. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In auto transformer if the turn ratio is K, what is the power transferred inductively? K × input power (1-K) × input power both A and B None of these K × input power (1-K) × input power both A and B None of these ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Larger values of air flux density is taken while designing IM for both. none. larger bore diameter. larger output. both. none. larger bore diameter. larger output. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines A transformer has hysteresis loss of 30 W, at 240 V, 60 Hz. The hysteresis loss at 200 V, 50 Hz will be 36 W. 28 W. 25 W. 30 W. 36 W. 28 W. 25 W. 30 W. ANSWER DOWNLOAD EXAMIANS APP
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