Electrical Machines The synchronous motor can be started by coupling it with a small AC induction motor called the pony motor. any of the above methods. coupling it with a DC compound motor. providing damper winding in its rotor circuit. coupling it with a small AC induction motor called the pony motor. any of the above methods. coupling it with a DC compound motor. providing damper winding in its rotor circuit. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines A single phase transformer when supplied from 220 V, 50 Hz has eddy current loss of 50 W. If the transformer is connected voltage of 330 V, 75 Hz, the eddy current loss will be 168.75 W 75 W 112.5 W 50 W 168.75 W 75 W 112.5 W 50 W ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The supply voltage to an induction motor is reduced by 10%. By what percentage, approximately, will the maximum torque decrease? 19% 10% 5% 40% 19% 10% 5% 40% ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In case of DC Shunt Motor, the speed will____ if the voltage increases, neglecting armature saturation. remain the same. be unpredictable. decrease. increase remain the same. be unpredictable. decrease. increase ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In a 3 - Φ IM in order to eliminate cogging the number of stator slots must be an integral multiple of number of rotor slots. unequal to number of rotor slots and skewed in shape. equal to number of rotor slots. either (B) or (C). an integral multiple of number of rotor slots. unequal to number of rotor slots and skewed in shape. equal to number of rotor slots. either (B) or (C). ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In a seperately excited DC Motor if field current is increased, it will Increase acceleration duration. Reduce armature heating. Reduce starting torque. Increase speed Increase acceleration duration. Reduce armature heating. Reduce starting torque. Increase speed ANSWER DOWNLOAD EXAMIANS APP
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