Electrical Machines The power factor of an induction motor operating at no load will have a value around 0.2 lag 0.9 lag 0.2 lead unity 0.2 lag 0.9 lag 0.2 lead unity ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Armature resistance control method is used for the _______ ? above rated speed below rated speed both 1 and 2 None of these above rated speed below rated speed both 1 and 2 None of these ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines For a 3-phase, 4 pole, 50 Hz synchronous motor the frequency, pole number and the frequency are halved. The motor speed will be 375 rpm 3000 rpm 75 rpm 1500 rpm 375 rpm 3000 rpm 75 rpm 1500 rpm ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In a DC Shunt Motor the speed can be increased by Increasing the field current. Decreasing the field current. Increasing the field current. Increasing the armature current. Increasing the field current. Decreasing the field current. Increasing the field current. Increasing the armature current. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines A 4 pole 50 Hz induction motor is running at 1470 rpm. The frequency of rotor current is 50 Hz 5 Hz 1 Hz 0 Hz 50 Hz 5 Hz 1 Hz 0 Hz 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 __________________. kept constant to certain value. increased. decreased. remains unchanged. kept constant to certain value. increased. decreased. remains unchanged. ANSWER DOWNLOAD EXAMIANS APP
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