Electrical Machines What is the effect of armature reaction ? Both option B and C. Armature flux distorts the main field flux. None of the options. Armature flux weakens the main field flux. Both option B and C. Armature flux distorts the main field flux. None of the options. Armature flux weakens the main field flux. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In case the conditions for maximum power for DC motor are established, the efficiency of the motor will be Around 100 %. Any where between 75 % and 90 %. Around 90 % Less than 50 % Around 100 %. Any where between 75 % and 90 %. Around 90 % Less than 50 % ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Armature reaction in dc motor results open circuit. decrease in speed. increase in speed. short circuit. open circuit. decrease in speed. increase in speed. short circuit. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines A part an alternator winding consist of eight coils in series, each having an emf of 20 V rms induced in it. Coils are placed in successive slots and between each slot and the next, there is an electrical phase displacement of 30°. Find the emf of eight coils in series 66.91 V. 56.91 V. 86.91 V. 76.91 V. 66.91 V. 56.91 V. 86.91 V. 76.91 V. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Tappings of a transformer are provided at the phase end of hv side at the phase end of lv side at the middle of hv side at the neutral side end of hv side at the phase end of hv side at the phase end of lv side at the middle of hv side at the neutral side end of hv side ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The application that need frequent starting and stopping is lifts and hoists. blowers. jaw crushers. paper mills. lifts and hoists. blowers. jaw crushers. paper mills. ANSWER DOWNLOAD EXAMIANS APP
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