Electrical Machines Which of the following is/are the methods to reduce the armature reaction and its effects? pole stacking compensating winding All of these pole chamfering pole stacking compensating winding All of these pole chamfering ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Unbalance 3 - Φ stator currents cause double frequency currents in the rotor. heating of rotor. vibrations. All of these double frequency currents in the rotor. heating of rotor. vibrations. All of these ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines A 240 V, dc shunt motor draws 15 A while supplying the rated load at a speed of 80 rad/s. The armature resistance is 0.5 W and the field winding resistance is 80 W. The net voltage across the armature resistance at the time of plugging will be 474 V 240 V 234 V 6 V 474 V 240 V 234 V 6 V ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines A separately excited DC motor has an armature resistance of 0.5 Ohm. The supply voltage is 250V. Armature current is 20A and the speed of rotation is 1500 rpm. Find the torque developed? 15.6 Nm 15.28 Nm 16.55 Nm Zero 15.6 Nm 15.28 Nm 16.55 Nm Zero ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The sequence of induction motor is RYB, then the direction of induction motor can be changed by which of the following sequence? BYR All of these RBY BRY BYR All of these RBY BRY ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Which of the following represents the commutator pitch? The distance between the staring of first coil and its next successive coil Number of commutator segments between two successive coils. Number of conductors spanned by one coil at the back end of the armature. Number of conductors spanned by one coil at the front end of the armature. The distance between the staring of first coil and its next successive coil Number of commutator segments between two successive coils. Number of conductors spanned by one coil at the back end of the armature. Number of conductors spanned by one coil at the front end of the armature. ANSWER DOWNLOAD EXAMIANS APP
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