Electrical Machines The frequency of voltage generated by an alternator having 8 poles and rotating at 250 rpm is 16.67 Hz. 60 Hz. 50 Hz. 25 Hz. 16.67 Hz. 60 Hz. 50 Hz. 25 Hz. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Field divertor method of speed control of a DC series motor gives speed above rated one due to reduction of Armature current. None of above. Field current. Line current. Armature current. None of above. Field current. Line current. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The armature MMF waveform of a DC machine is pulsating. triangular. rectangular. sinusoidal. pulsating. triangular. rectangular. sinusoidal. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Where the shunt generators are widely used? Where often load fluctuation is occurred. Where a constant voltage is required over a narrow load range. Where voltage variation is needed over a wide load range. Where the load is very high. Where often load fluctuation is occurred. Where a constant voltage is required over a narrow load range. Where voltage variation is needed over a wide load range. Where the load is very high. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Capacitor in split phase induction motor is used to start the motor. improve the power factor. improve the starting torque. reduce the harmonics. start the motor. improve the power factor. improve the starting torque. reduce the harmonics. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines A smaller air gap in a polyphase induction motor helps to reduce the magnetizing current. reduce the chance of cogging. increase the starting torque. reduce the chance of crawling. reduce the magnetizing current. reduce the chance of cogging. increase the starting torque. reduce the chance of crawling. ANSWER DOWNLOAD EXAMIANS APP
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