Electrical Machines To avoid formation of grooves in the commutator the brushes of same polarity should track each other. the brushes of opposite polarity should track each other. None of these brush position has no effect on the commutator grooving. the brushes of same polarity should track each other. the brushes of opposite polarity should track each other. None of these brush position has no effect on the commutator grooving. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines DC Shunt Motor has disadvantage(s) of not suitable for rapidly changing loads. constant speed. none of above. less expensive. not suitable for rapidly changing loads. constant speed. none of above. less expensive. 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 86.91 V. 76.91 V. 66.91 V. 56.91 V. 86.91 V. 76.91 V. 66.91 V. 56.91 V. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In synchronous motor, the damper winding is generally used to reduce noise level only. provide starting torque only. prevent hunting and provide the starting torque. reduce the eddy currents. reduce noise level only. provide starting torque only. prevent hunting and provide the starting torque. reduce the eddy currents. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The core flux in transformer depends mainly on supply voltage and frequency supply voltage and load supply voltage supply voltage, frequency and load supply voltage and frequency supply voltage and load supply voltage supply voltage, frequency and load ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The coil spam none of above. may or may not be exactly equal to people pitch. can never be equal to pole pitch. must be exactly equal to people pitch. none of above. may or may not be exactly equal to people pitch. can never be equal to pole pitch. must be exactly equal to people pitch. ANSWER DOWNLOAD EXAMIANS APP
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