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 2% 25% 5% 4% 2% 25% 5% 4% ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines which of the following type of brush and their application is/are correct carbon brush → normal ratings All of these copper graphite → low voltage high current density electro graphite → large ratings carbon brush → normal ratings All of these copper graphite → low voltage high current density electro graphite → large ratings ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Sparkless commutation can be achieved by employing any one or more of the above methods. inter poles. high resistance carbon brushes. compensating winding. any one or more of the above methods. inter poles. high resistance carbon brushes. compensating winding. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Which of the following motor has more stability cylindrical motor None of these salient pole motor both motors has same stability cylindrical motor None of these salient pole motor both motors has same stability ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Ideal value of voltage regulation of a device is? ∞ 0 a positive finite value a finite negative value ∞ 0 a positive finite value a finite negative value 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 1000 rpm, 950 rpm. zero, 950 rpm. 1000 rpm, - 50 rpm. zero , - 50 rpm. 1000 rpm, 950 rpm. zero, 950 rpm. 1000 rpm, - 50 rpm. zero , - 50 rpm. ANSWER DOWNLOAD EXAMIANS APP
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