Electrical Machines Slot wedges in a dc machine is made up of cast iron. fibre. silicon steel. mild steel. cast iron. fibre. silicon steel. mild steel. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In case of DC Shunt Motor, the speed will____ if the voltage increases, neglecting armature saturation. increase be unpredictable. decrease. remain the same. increase be unpredictable. decrease. remain the same. 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 __________________. increased. kept constant to certain value. remains unchanged. decreased. increased. kept constant to certain value. remains unchanged. decreased. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines A commutator with a diameter of 50 cm rotating at 1000 rpm. For a brush width of 1.5 cm, find the time of commutation in ms. 0.512. 0.649. 0.573. 0.443. 0.512. 0.649. 0.573. 0.443. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines An IM cannot run at synchronous speed because induction motor will become synchronous motor. none of above. air friction will prevent it. rotor torque will not be produced. induction motor will become synchronous motor. none of above. air friction will prevent it. rotor torque will not be produced. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Find the number of poles required, when the frequency is 50Hz and speed of the motor is 500 rpm? 12 10 24 5 12 10 24 5 ANSWER DOWNLOAD EXAMIANS APP
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