Electrical Machines The self induced emf in the coil undergoing commutation is called the None of these statically induced voltage. reactance voltage. dynamically induced voltage. None of these statically induced voltage. reactance voltage. dynamically induced voltage. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines If a DC motor is connected across the AC supply it will Run at normal speed. Burn. Not run. Run at lower speed. Run at normal speed. Burn. Not run. Run at lower speed. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In DC shunt motor if load is increased, the speed remains constant. increased slightly. increase proportional. reduce slightly. remains constant. increased slightly. increase proportional. reduce slightly. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines For satisfactory parallel operation of two transformers which of the following conditions is most essential, MVA rating of all transformer inversely proportional to impedance. voltage ratio of all transformers must be same. percentage impedance of all transformers must be same. polarities of all transformers must be same. MVA rating of all transformer inversely proportional to impedance. voltage ratio of all transformers must be same. percentage impedance of all transformers must be same. polarities of all transformers must be same. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines When a short circuit test on a transformer is performed at 25 V, 50 Hz, the drawn current is I1. If the test is performed by 25 V and 25 Hz and power drawn current is I2, then I1 > I2 None of these I1 < I2 I1 = I2 I1 > I2 None of these I1 < I2 I1 = I2 ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Oil is provided in an oil filled transformer for lubrication. insulating. cooling. both cooling and insulation. lubrication. insulating. cooling. both cooling and insulation. ANSWER DOWNLOAD EXAMIANS APP
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