Electrical Machines In dc motors, under leading pole tips flux density will--------? increase None of these either increase or decrease decrease increase None of these either increase or decrease decrease ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Maximum power developed in a cylindrical synchronous machine depends on load angle excitation synchronous reactance both 1and 2 load angle excitation synchronous reactance both 1and 2 ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The introduction of interpoles in between the main poles improves the performance of a dc machine, because 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 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 ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Which of the following statements are correct ? A small value of leakage reactance will increase the maximum power output of motor. Both 1 and 2. The leakage reactance of the induction motor should be small. None of these A small value of leakage reactance will increase the maximum power output of motor. Both 1 and 2. The leakage reactance of the induction motor should be small. None of these ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Counter emf of a DC motor helps in energy conversion. regulates its armature voltage. exceeds supply voltage aids applied voltage. helps in energy conversion. regulates its armature voltage. exceeds supply voltage aids applied voltage. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Resistance commutation is used generally in case of None of these DC machines above 10 kW. fractional kW DC machines. DC machines bellow 5 kW. None of these DC machines above 10 kW. fractional kW DC machines. DC machines bellow 5 kW. ANSWER DOWNLOAD EXAMIANS APP
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