Electrical Machines Current in a coil undergoing commutation is not able to get reversed completely by the end of commutation period. It is due to reactance voltage induced in the coil. coil resistance. None of these armature emf. reactance voltage induced in the coil. coil resistance. None of these armature emf. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The supply voltage to an induction motor is reduced by 10%. By what percentage, approximately, will the maximum torque decrease? 40% 5% 19% 10% 40% 5% 19% 10% ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The armature MMF waveform of a DC machine is pulsating. sinusoidal. rectangular. triangular. pulsating. sinusoidal. rectangular. triangular. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In a 3 - Φ IM with line frequency f1 and winding factor kw1 and kw2 for stator and rotor respectively the ratio of per phase stator winding emf E1 to per phase rotor winding emf E2 at standstill is given by E1 / E2 = 1. E1 / E2 = N1kw1 / N2kw2. E1 / E2 = f1kw1 / f2kw2. E1 / E2 = N1 / N2. E1 / E2 = 1. E1 / E2 = N1kw1 / N2kw2. E1 / E2 = f1kw1 / f2kw2. E1 / E2 = N1 / N2. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Stepper motor is used in computer printers traction food processing All of these computer printers traction food processing All of these ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Regenerative braking is possible in DC compound motor. DC shunt motor with field weakening control. DC series motor. DC shunt motor with armature resistance control. DC compound motor. DC shunt motor with field weakening control. DC series motor. DC shunt motor with armature resistance control. ANSWER DOWNLOAD EXAMIANS APP
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