Electrical Machines The slip of an induction motor normally does not depend on which of the following? Rotor speed. Shaft torque. Synchronous speed. Core loss component. Rotor speed. Shaft torque. Synchronous speed. Core loss component. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In large sized DC machines the compensating windings are provided to None of these compensate for the decrease in speed due to increase of load. neutralize voltage induced in coil due to fluctuation of l reduce eddy current losses by providing local short circuits. None of these compensate for the decrease in speed due to increase of load. neutralize voltage induced in coil due to fluctuation of l reduce eddy current losses by providing local short circuits. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In case of IM the torque is inversely proportional to slip. directly proportional to slip. directly proportional to slip2. inversely proportional to √slip. inversely proportional to slip. directly proportional to slip. directly proportional to slip2. inversely proportional to √slip. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines A transformer core is made up of a silicon steel laminations which has maximum flux density 1 Tesla. If it was cold rolled grain oriented its flux density increases to 1.6 Tesla. What is the saving in core size or area due to cold rolled grain oriented process? 60% 68% 38% 40% 60% 68% 38% 40% ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Which of the following motor is not suitable for frequent starting and stopping? Capacitor split phase motor Resistance split phase motor Capacitor run motor All of these Capacitor split phase motor Resistance split phase motor Capacitor run motor All of these ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Silicon content in steel lamination is kept within 5% as it Increases cost. increases hysteresis loss. All of these makes the material brittle. Increases cost. increases hysteresis loss. All of these makes the material brittle. ANSWER DOWNLOAD EXAMIANS APP
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