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- Subject
- Synchronous Motorselectrical-engineering-mcqs › synchronous-motors
- Published
- 19 Oct 2018
- Last updated
- 28 May 2026
Explanation
When a synchronous motor runs at no load, the back EMF generated in the armature closely matches the applied voltage, indicating that the motor's excitation is at one hundred percent. This means the field current is sufficient to produce the necessary magnetic flux without any load torque.
More Synchronous Motors MCQs
Practice related questions from the same subject.
- 1.What is the primary application of an over-excited synchronous motor?
- 2.At what operating condition can a synchronous motor generate synchronous torque?
- 3.What factors determine the maximum power output of a synchronous motor?
- 4.For a synchronous motor, the breakdown torque is proportional to which of the following?
- 5.What is the term for a synchronous motor operating at a leading power factor without any mechanical load?
- 6.When a synchronous motor is correctly synchronized with the power supply, operating without any load and experiencing negligible losses, what will be the condition of the stator current?
- 7.What does the coupling angle, also known as the load angle, of a synchronous motor represent?
- 8.What is the term for the highest torque a synchronous motor can produce while stationary, regardless of the rotor's angular position, at rated stator voltage and frequency?
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