When the field of a synchronous motor is under-excited, the power factor will be Options: A . &nbspleading B . &nbsplagging C . &nbspunity D . &nbspzero

When the field of a synchronous motor is under-excited, the power factor will be

Question

When the field of a synchronous motor is under-excited, the power factor will be

Options:

A . leading

B . lagging

C . unity

D . zero

Answer: Option B

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Question 1. If the field of a synchronous motor is underexcited, the power factor will be....

Question 2. In a synchronous motor it the back e.m.f. generated in the armature at noload is approximately equal to the applied volt....at noload is approximately equal to the applied voltage, then

Question 3. A synchronous motor connected to infinite bus-bars has at constant full load, 100% excitation and unity power factor. On....On changing the excitation only, the armature current will have

Question 4. A synchronous motor develops maximum power when load angle is....

Question 5. Change of D.C. excitation of a synchronous motor changes....

Question 6. The maximum constant load torque under which a synchronous motor will pull into synchronism at rated rotor supply voltag....at rated rotor supply voltage and frequency is known as

Question 7. Mostly, synchronous motors are of....

Question 8. In a synchronous motor which loss varies with load ?....

Question 9. A synchronous machine with low value of short-circuit ratio has....

Question 10. The magnitude of field flux in a 3-phase synchronous motor....

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