Electrical Machines A 4 pole 50 Hz induction motor is running at 1470 rpm. Find the speed of stator magnetic field with respect to rotor? 1470 rpm 30 rpm zero 1500 rpm 1470 rpm 30 rpm zero 1500 rpm ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines An auto transformer having a transformation ratio of 0.8 supplies a load pf 10 KW. The power transfered inductively from the primary to secondary is 0. 2 KW. 8 KW. 10 KW. 0. 2 KW. 8 KW. 10 KW. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In a synchronous motor electromagnetic power varies directly as square of applied voltage inversely as applied voltage None of these directly as applied voltage directly as square of applied voltage inversely as applied voltage None of these directly as applied voltage ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In a synchronous machine, if φ is the flux per pole and f is the frequency of the emf induced E then E ∝ φ/f E ∝ φf E ∝ 1/(φf) E ∝ f/φ E ∝ φ/f E ∝ φf E ∝ 1/(φf) E ∝ f/φ ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines A 3-phase, 2 pole, 12 slot synchronous machine is operating at synchronous speed. Find the slot angle? 18° 30° 60° 20° 18° 30° 60° 20° ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In a synchronous motor hunting can be reduced to minimum possible by any of above methods. providing damper winding in the rotor pole faces. designing the motor for adequate synchronizing power. using a flywheel. any of above methods. providing damper winding in the rotor pole faces. designing the motor for adequate synchronizing power. using a flywheel. ANSWER DOWNLOAD EXAMIANS APP
EXAMIANS