Electrical Machines Which type of single phase induction motor is having the highest power factor at full load ? Capacitor run type. Capacitor start. Shaded pole type. Split phase type. Capacitor run type. Capacitor start. Shaded pole type. Split phase type. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines A 3 - Φ, 12 pole, 600 V, 50 Hz star connected IM has rotor resistance and stand still resistance of 0.03 Ω and 0.5 Ω respectively. The speed of maximum torque will be 450 rpm. 540 rpm. 240 rpm. 470 rpm. 450 rpm. 540 rpm. 240 rpm. 470 rpm. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines An IM cannot run at synchronous speed because 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. induction motor will become synchronous motor. none of above. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In case of a conductively compensated DC series motor, the compensating winding is provided In series with the armature winding. In parallel with the field winding. In parallel with the armature winding. As a separate unit. In series with the armature winding. In parallel with the field winding. In parallel with the armature winding. As a separate unit. 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 __________________. decreased. increased. kept constant to certain value. remains unchanged. decreased. increased. kept constant to certain value. remains unchanged. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines What is the frequency of a alternator, if P = number of poles and N = revolution made per second? 120 / PN Hz. 120N / P Hz. PN / 2 Hz. 120P / N Hz. 120 / PN Hz. 120N / P Hz. PN / 2 Hz. 120P / N Hz. ANSWER DOWNLOAD EXAMIANS APP
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