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 A single-winding single-phase motor has zero starting torque. low starting torque. starting torque equal to full-load torque. high starting torque. zero starting torque. low starting torque. starting torque equal to full-load torque. high starting torque. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Flashing of DC generator means increasing flux density by providing extra ampere-turns in field. None of these creation of residual magnetism by a DC source. neutralization of residual magnetism. increasing flux density by providing extra ampere-turns in field. None of these creation of residual magnetism by a DC source. neutralization of residual magnetism. 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 2% 5% 25% 4% 2% 5% 25% 4% ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines If the no-voltage release in a DC motor starter fails to operate on failure of supply, on resumption of supply the motor will start automatically without trouble. develop very low starting torque. not start automatically. get damaged. start automatically without trouble. develop very low starting torque. not start automatically. get damaged. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines A DC generator without commutator is a DC motor AC generator DC generator induction motor DC motor AC generator DC generator induction motor ANSWER DOWNLOAD EXAMIANS APP
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