Electrical Machines For the above problem, find the induced voltage of an alternator of it is to deliver a load of 100 A at power factor of 0.8 lagging with terminal voltage of 200 V. 220 V. 225 V. 230 V. 222 V. 220 V. 225 V. 230 V. 222 V. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In which of the following motors DC excitation is not required? 3-phase synchronous motor 3-phase synchronous generator reluctance motor hysteresis motor 3-phase synchronous motor 3-phase synchronous generator reluctance motor hysteresis motor ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines A simple method of increasing the voltage of a DC generator is to increase the source frequency. increase the number of turns in field coil. increase the number of turns in armature coil. increase the speed of shaft rotation. increase the source frequency. increase the number of turns in field coil. increase the number of turns in armature coil. increase the speed of shaft rotation. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines For satisfactory parallel operation of two transformers which of the following conditions is most essential, percentage impedance of all transformers must be same. voltage ratio of all transformers must be same. polarities of all transformers must be same. MVA rating of all transformer inversely proportional to impedance. percentage impedance of all transformers must be same. voltage ratio of all transformers must be same. polarities of all transformers must be same. MVA rating of all transformer inversely proportional to impedance. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines A 3 - Φ, 12 pole, 600 V, 50 Hz star connected IM has rotor resistance and stand still resistance of 0.03 Ω and 0.5 Ω respectively. The speed of maximum torque will be 470 rpm. 540 rpm. 450 rpm. 240 rpm. 470 rpm. 540 rpm. 450 rpm. 240 rpm. 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 permanent magnets. residual magnetism. armature reaction. None of these permanent magnets. residual magnetism. armature reaction. None of these ANSWER DOWNLOAD EXAMIANS APP
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