Electrical Machines Find the number of poles required, when the frequency is 50Hz and speed of the motor is 500 rpm? 10 12 5 24 10 12 5 24 ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The rotor of a 3 - Φ wound induction motor is provided with single phase winding. three phase winding. heavy short-circuited end rings. heavy copper or aluminium bars placed in rotor slots. single phase winding. three phase winding. heavy short-circuited end rings. heavy copper or aluminium bars placed in rotor slots. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The synchronous speed of an induction motor will be increased by decreasing of frequency. increasing of frequency. speed can not be increased. increasing number of poles. decreasing of frequency. increasing of frequency. speed can not be increased. increasing number of poles. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In an auto transformer, for what value of turn ratio, power transferred by inductively and conductively are same? 1 any of the above 0.5 0 1 any of the above 0.5 0 ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Exciting current of an induction motor is lesser than power transformer. higher than power transformer. equal as power transformer. none of these. lesser than power transformer. higher than power transformer. equal as power transformer. none of these. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In the V curve shown in figure below for a synchronous motor, the parameter of Y and X coordinates are, respectively Armature current and field current. Power factor and field current. Torque and field current. Armature current and torque. Armature current and field current. Power factor and field current. Torque and field current. Armature current and torque. ANSWER DOWNLOAD EXAMIANS APP
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