Explore topic-wise MCQs in Power Electronics.

This section includes 4 Mcqs, each offering curated multiple-choice questions to sharpen your Power Electronics knowledge and support exam preparation. Choose a topic below to get started.

1.

A motor generator set used for providing variable frequency AC supply consist of a three-phase, 10-pole synchronous motor and a 24-pole, three-phase synchronous generator. The motor-generator set is fed from a 25 Hz, three-phase AC supply. Determine the frequency of the generated voltage of the synchronous generator.

A. 40 Hz
B. 50 Hz
C. 25 Hz
D. 60 Hz
Answer» E.
Discussion
2.

In a four-quadrant operation of an electric machine, the third quadrant operation is:

A. forward motoring
B. reverse braking
C. forward braking
D. reverse motoring
Answer» E.
Discussion
3.

For a three-phase induction motor drive, which of the following technique is NOT used?

A. Frequency control
B. Stator voltage control
C. Rotor voltage control
D. Moisture control
Answer» E.
Discussion
4.

In the speed control of a slip ring induction motor using slip power recovery scheme ______.

A. The efficiency increases but power factor decreases.
B. Efficiency improves and power factor remains constant.
C. Power factor improves but efficiency decreases.
D. Both power factor and efficiency improve.
Answer» B. Efficiency improves and power factor remains constant.
Discussion