Electrical Machines A 4-pole dc generator runs at 1500 rpm. The frequencyof current in the armature winding is 50 Hz 25 Hz 0 Hz 100 Hz 50 Hz 25 Hz 0 Hz 100 Hz ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines At what power factor, the voltage regulation of a transformer can be zero ? Lagging power factor. Leading power factor. Zero power factor. Unity power factor. Lagging power factor. Leading power factor. Zero power factor. Unity power factor. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In a DC generator, if P be the number of poles and N be the rpm of the rotor, then frequency of magnetic reversals will be PN/120. PN/60. PN/3000. PN/2. PN/120. PN/60. PN/3000. PN/2. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Two synchronous generators operating in parallel 200 MW and 400 MW respectively. The drooping characteristics of their governors are 4% and 5% from no load to full load. Consider the governors operating at 50Hz on no load. How will the machine share, if the load is 600 MW? 200 MW and 400MW generator 2 gets over load None of these generator 1 gets over load 200 MW and 400MW generator 2 gets over load None of these generator 1 gets over load ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Poles of DC machine are often laminated to reduce armature reaction. dissipate more heat. reduce pulsation loss. reduce iron weight. reduce armature reaction. dissipate more heat. reduce pulsation loss. reduce iron weight. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines A 4 pole, 3-phase induction motor is running at 4% slip at full load. If the speed of the motor is 720 rpm, the supply frequency is 60 Hz 40 HZ 50 Hz 25 Hz 60 Hz 40 HZ 50 Hz 25 Hz ANSWER DOWNLOAD EXAMIANS APP
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