Electrical Machines A 4-pole dc generator runs at 1500 rpm. The frequencyof current in the armature winding is 100 Hz 50 Hz 0 Hz 25 Hz 100 Hz 50 Hz 0 Hz 25 Hz ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In DC series motor the speed is ______________ proportional to the armature current. directly. has no relation. none of these. inversely. directly. has no relation. none of these. inversely. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The power factor of squirrel cage induction motor is both A and B low at light loads only low at rated load only low at heavy loads only both A and B low at light loads only low at rated load only low at heavy loads only ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Universal motor have which of the following application? Domestic pump. Traction. Lift. Food mixer. Domestic pump. Traction. Lift. Food mixer. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In a transformer which of the following losses are zero? Copper loss Rotational loss Iron loss All of these Copper loss Rotational loss Iron loss All of these ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines If in a sub – station there is one 132 / 33 kV transformer whose secondary is connected with primary of one 33 / 11 kV transformer, the total transformation ratio of the sub – station will be, 7. 12. 3. 4. 7. 12. 3. 4. ANSWER DOWNLOAD EXAMIANS APP
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