Electrical Machines If an additional resistance is connected in series with a DC series motor operating at rated speed, the speed of the motor will Increase. Reduce. Remain unaltered. Oscillate around the normal speed. Increase. Reduce. Remain unaltered. Oscillate around the normal speed. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines If the excitation is critical, the power factor of the alternator is leading power factor. None of these unity power factor. lagging power factor. leading power factor. None of these unity power factor. lagging power factor. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Which of the following windings are necessary in case of all dc machines? open type winding closed winding lap winding wave winding open type winding closed winding lap winding wave winding ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines To increase starting torque of a 3-phase slip ring induction motor, preferred method is to increase supply frequency rotor resistance None of these supply voltage supply frequency rotor resistance None of these supply voltage ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The power flow of a dc motor, with respect to a DC generator is modified. reversed. none of these. increased. modified. reversed. none of these. increased. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The breakdown torque of a synchronous motor varies as 1/V 1/V² applied voltage V V² 1/V 1/V² applied voltage V V² ANSWER DOWNLOAD EXAMIANS APP
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