Electrical Machines Magnetic field of a DC generator is produced by what? Electromagnets. Both B and C. None of the options. Permanent magnets. Electromagnets. Both B and C. None of the options. Permanent magnets. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The power flow of a dc motor, with respect to a DC generator is modified. reversed. none of these. increased. modified. reversed. none of these. increased. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines If the load current and flux of a DC motor are held constant and voltage applied across it armature is increased by 5%, the speed of the motor will Reduce by 5%. Depends on other factor. Increase by 5%. Remain unchanged. Reduce by 5%. Depends on other factor. Increase by 5%. Remain unchanged. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines A 400 V, 50 Hz, 30 Hp, three phase IM is drawing 50 A current at 0.8 p.f lagging. The stator and rotor copper losses are 1.5 KW and 900 W respectively. The friction and windage losses are 1050 W and core losses are 1200 W. The air gap power of the motor will be 23.06 kW. 26.21 kW. 24.11 kW. 25 kW. 23.06 kW. 26.21 kW. 24.11 kW. 25 kW. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines What is power factor of a 3 - φ induction motor at no load? High. Same as full load. Equal to 1. Low. High. Same as full load. Equal to 1. Low. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In a 6 pole DC machine, 90 mechanical degrees correspond to which of the following electrical degree? 270. 30. 180. 45. 270. 30. 180. 45. ANSWER DOWNLOAD EXAMIANS APP
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