Electrical Machines In a DC machine, which of these parameters remain the same whether it runs as a DC motor or a DC generator? Induced emf. Can not be determined. Mechanical power. Armature current. Induced emf. Can not be determined. Mechanical power. Armature current. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines A 4 pole 50 Hz induction motor is running at 1470 rpm. The frequency of rotor current is 0 Hz 5 Hz 1 Hz 50 Hz 0 Hz 5 Hz 1 Hz 50 Hz ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The slip of an induction motor during DC rheostatic braking is s. 2 + s. 2 - s. 1 - s. s. 2 + s. 2 - s. 1 - s. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines A voltmeter gives 120 oscillations per minute when connected to the rotor of an induction motor. The frequency is 50Hz. The slip of the motor is 25% 4% 5% 2% 25% 4% 5% 2% ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The magnetic field which initially induces emf in the armature in a self excited DC generator is because of residual magnetism. None of these permanent magnets. armature reaction. residual magnetism. None of these permanent magnets. armature reaction. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Which motor cannot be started on no load? series motors both B and C cumulative compound motors shunt motors series motors both B and C cumulative compound motors shunt motors ANSWER DOWNLOAD EXAMIANS APP
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