Electrical Machines A 4-pole dc generator runs at 1500 rpm. The frequencyof current in the armature winding is 0 Hz 100 Hz 25 Hz 50 Hz 0 Hz 100 Hz 25 Hz 50 Hz ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Armature reaction in a DC machine makes an angle of 90° with the main pole axis. is in the same direction as the main poles. makes an angle with the main pole axis which is load dependent. is in direct opposition to the main poles. makes an angle of 90° with the main pole axis. is in the same direction as the main poles. makes an angle with the main pole axis which is load dependent. is in direct opposition to the main poles. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Short circuiting is caused in the armature winding due to failure of insulation between two turns of coil. failure of insulation between two commutator bars. grounding of two or more turns of the same coil. any of above. failure of insulation between two turns of coil. failure of insulation between two commutator bars. grounding of two or more turns of the same coil. any of above. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines A voltmeter gives 120 oscillations per minute when connected to the rotor of an induction motor. The frequency is 50Hz. The slip of the motor is 5% 2% 4% 25% 5% 2% 4% 25% ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Which of the following motor is used in grinders? Synchronous motor. Capacitor start IM. Split phase IM. Capacitor start capacitor run IM. Synchronous motor. Capacitor start IM. Split phase IM. Capacitor start capacitor run IM. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Inter pole winding is connected in-------------------------- ? parallel with armature series with armature series with main poles parallel with main poles parallel with armature series with armature series with main poles parallel with main poles ANSWER DOWNLOAD EXAMIANS APP
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