5. When load on a synchronous motor running with normal excitation is increased, armature current drawn by it increases because Options: A . &nbspback e.m.f. Eb becomes less than the applied voltage V B . &nbsppower factor is decreased C . &nbspnet resultant voltage Er in armature is increased D . &nbspmotor speed is reduced

5. When load on a synchronous motor running with normal excitation is incre

Question

5. When load on a synchronous motor running with normal excitation is increased, armature current drawn by it increases because

Options:

A . back e.m.f. Eb becomes less than the applied voltage V

B . power factor is decreased

C . net resultant voltage Er in armature is increased

D . motor speed is reduced

Answer: Option C

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Question 1. 2. Synchronous motors are generally used in applications requiring....

Question 2. 3. In a synchronous motor, the magnitude of stator back e.m.f. Eb depends on....

Question 3. 4. If load angle of a 4-pole synchronous motor is 80 (elect.), its value in mechanical degrees is....

Question 4. 9. Synchronous capacitor is ....

Question 5. 8. The maximum value of torque in a synchronous motor is degrees electrical.....

Question 6. 5. The maximum value of torque in a synchronous motor is degrees electrical.....

Question 7. 6. Synchronous capacitor is ....

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