Electrical Machines To get the speed of DC motor more than normal without wastage of electrical energy _____________ is used. rheostatic control. Ward Leonard control. none of above. any of above method. rheostatic control. Ward Leonard control. none of above. any of above method. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In a dc machine, the demagnetizing effect of armature reaction is due to uneven air-gap length component of armature mmf along field axis non-sinusoidal nature of armature mmf magnetic saturation in half of the field pole uneven air-gap length component of armature mmf along field axis non-sinusoidal nature of armature mmf magnetic saturation in half of the field pole ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Flashing the field of DC generator means making the magnetic losses forces parallel. neutralising residual magnetism. increasing flux density by adding extra turns of winding. creating residual magnetism by a DC source. making the magnetic losses forces parallel. neutralising residual magnetism. increasing flux density by adding extra turns of winding. creating residual magnetism by a DC source. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines A 3-phase, 50 Hz, 4 pole induction motor is running at 1440 rpm and rotor input power is 2KW. Find the rotor copper loss? 100W 80W 60W 40W 100W 80W 60W 40W ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines What is the effect of armature reaction ? None of the options. Armature flux weakens the main field flux. Armature flux distorts the main field flux. Both option B and C. None of the options. Armature flux weakens the main field flux. Armature flux distorts the main field flux. Both option B and C. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines For the purpose of starting an induction motor, star/delta switch is an equivalent to auto transformer of ratio 57.7% 66.3% 50% 33.3% 57.7% 66.3% 50% 33.3% ANSWER DOWNLOAD EXAMIANS APP
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