Electrical Machines Two DC series motors are connected in series and are driving the same mechanical load. If the motors are now connected in parallel the speed will become double. 4 times. half. one fourth. double. 4 times. half. one fourth. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In a DC machine emf in armature conductors and at the terminals is alternating. current and emf in armature are alternating. current and emf at the terminals are alternating. current and emf in armature are unidirectional emf in armature conductors and at the terminals is alternating. current and emf in armature are alternating. current and emf at the terminals are alternating. current and emf in armature are unidirectional ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines An IM cannot run at synchronous speed because rotor torque will not be produced. induction motor will become synchronous motor. air friction will prevent it. none of above. rotor torque will not be produced. induction motor will become synchronous motor. air friction will prevent it. none of above. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines At the instant of starting, the per unit slip of 3 - Φ induction motor is 0.05. 0.1. 1.0. 0.5. 0.05. 0.1. 1.0. 0.5. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The introduction of interpoles in between the main poles improves the performance of a dc machine, because the inequality of air-gap flux on the top and bottom halves of the armature is removed the flux waveform is improved with reduction in harmonics the interpoles produce additional flux to augment the developed torque a counter-emf is induced in the coil undergoing commutation the inequality of air-gap flux on the top and bottom halves of the armature is removed the flux waveform is improved with reduction in harmonics the interpoles produce additional flux to augment the developed torque a counter-emf is induced in the coil undergoing commutation ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Which of following DC motors will have percentage increase of input current for the same percentage increase in torque? Cummulative compound. Series. Differntical compound. Shunt. Cummulative compound. Series. Differntical compound. Shunt. ANSWER DOWNLOAD EXAMIANS APP
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