Electrical Machines If a DC Series motor is connected across an AC supply it will run at normal speed. burn. run at lower speed. not run. run at normal speed. burn. run at lower speed. not run. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines A DC cumulatively compounded motor delivers rated load torque at rated speed. If the series field is short-circuited, then the armature current and speed will both increase increase and decrease respectively decrease and increase respectively both decrease both increase increase and decrease respectively decrease and increase respectively both decrease ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In electric locomotive which of the following motor are used ? Synchronous motor. DC series motor. Shunt motor. Separately compound motor. Synchronous motor. DC series motor. Shunt motor. Separately compound motor. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Which slots are used in the rotor of an induction motor? Semi closed slots. Closed slots. None of above. Open slots. Semi closed slots. Closed slots. None of above. Open slots. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Compensating windings are used in DC generators to neutralize the cross magnetizing effect of the armature reaction. None of these mainly to reduce the eddy currents by providing local short circuit. to provide path for the circulation of cooling air. to neutralize the cross magnetizing effect of the armature reaction. None of these mainly to reduce the eddy currents by providing local short circuit. to provide path for the circulation of cooling air. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines If peak value of phase mmf is F max , then peak value of the rotating field caused by three phase is (3/2)Fmax. Fmax. 3Fmax. (1/2)Fmax. (3/2)Fmax. Fmax. 3Fmax. (1/2)Fmax. ANSWER DOWNLOAD EXAMIANS APP
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