Electrical Machines If a DC Series motor is connected across an AC supply it will run at lower speed. run at normal speed. burn. not run. run at lower speed. run at normal speed. burn. not run. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines If an AC servomotor has one of its winding excited by AC, then voltage measured at the other winding with rotor running will be proportional to square of rotor speed. proportional to rotor speed. constant independent of speed. zero. proportional to square of rotor speed. proportional to rotor speed. constant independent of speed. zero. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The oscillation in a synchronous motor can be damped out by oscillation cannot be damped. maintaining constant excitation. running the motor on leading power factors. providing damper bars in the rotor pole faces. oscillation cannot be damped. maintaining constant excitation. running the motor on leading power factors. providing damper bars in the rotor pole faces. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines When the rotor of a 3 phase induction motor is blocked then the slip is 0.54. 0.3. 0.7. 1. 0.54. 0.3. 0.7. 1. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines If the mechanical angle α between the stator and rotor poles increases, then the stator current None of above. Decreases. Increases. Remains unchanged. None of above. Decreases. Increases. Remains unchanged. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Saving of copper in auto transformer is increased as compared to two winding transformer, when transformation ratio K approaches to zero. unity. two. infinity. zero. unity. two. infinity. ANSWER DOWNLOAD EXAMIANS APP
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