Electrical Machines Flux density under leading pole tips in case of generator will either increase or decrease None of these increase decrease either increase or decrease None of these increase decrease ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines What is the mechanical power developed by a DC series motor is maximum? Back emf is equal to zero. None of above. Back emf is equal to half the applied voltage. Back emf is equal to applied voltage. Back emf is equal to zero. None of above. Back emf is equal to half the applied voltage. Back emf is equal to applied voltage. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines A DC series motor has which of the following characteristics? Can be started easily without load. Has a poor torque. Has its field winding consinting of thick wire and less no of turns. Has a almost constant speed. Can be started easily without load. Has a poor torque. Has its field winding consinting of thick wire and less no of turns. Has a almost constant speed. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines If the excitation is reduced, the power factor is unity power factor lagging power factor None of these leading power factor unity power factor lagging power factor None of these leading power factor ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Cogging and crawling are phenomena associated with the former at a fraction of its rate speed and the latter during starting. cage induction machines and they are essentially the same. the former during starting and the latter at a fraction of its rated speed. any of the above. the former at a fraction of its rate speed and the latter during starting. cage induction machines and they are essentially the same. the former during starting and the latter at a fraction of its rated speed. any of the above. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In a DC generator the emf generated by the armature is maximum when induced voltage is high. shaft rotation is high. rate of change of flux is maximum. rate of change of flux is minimum. induced voltage is high. shaft rotation is high. rate of change of flux is maximum. rate of change of flux is minimum. ANSWER DOWNLOAD EXAMIANS APP
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