Electrical Machines If the applied voltage to a dc machine is 230 V, then the back emf, for maximum power developed, is 200 V 115 V 230 V 460 V 200 V 115 V 230 V 460 V ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines A three phase 400 V, 6 pole, 50 Hz, squirrel cage induction motor is running at a slip of 5%. The speed of stator magnetic field with respect to rotor magnetic field and speed of rotor w.r.t stator magnetic field are zero, 950 rpm. zero , - 50 rpm. 1000 rpm, - 50 rpm. 1000 rpm, 950 rpm. zero, 950 rpm. zero , - 50 rpm. 1000 rpm, - 50 rpm. 1000 rpm, 950 rpm. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines If the frequency of input voltage of a transformer is increased keeping the magnitude of voltage unchanged, then Ph will increase but Pe will decrease Ph will decrease but Pe will remain same Pe will increase but Ph will decrease both hysteresis loss(Ph) and eddy current loss(Pe) will increase Ph will increase but Pe will decrease Ph will decrease but Pe will remain same Pe will increase but Ph will decrease both hysteresis loss(Ph) and eddy current loss(Pe) will increase ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Series generators are used in which of the following applications? Arc welding. Used as boosters in dc distribution or transmission. Air crafts. All of these Arc welding. Used as boosters in dc distribution or transmission. Air crafts. All of these ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In a Dc generator the magnetic neutral axis coincide with geometrical neutral axis, when the generator runs on overload. the generator runs on designed speed. there is no load on the generator. the generator runs on full load. the generator runs on overload. the generator runs on designed speed. there is no load on the generator. the generator runs on full load. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The heat transfer by convection in a transformer least depends on air velocity. surface area. color of the paint. temperature difference. air velocity. surface area. color of the paint. temperature difference. ANSWER DOWNLOAD EXAMIANS APP
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