Power Electronics MCQs

Welcome to our comprehensive collection of Multiple Choice Questions (MCQs) on Power Electronics, a fundamental topic in the field of Electronics and Communication Engineering. Whether you're preparing for competitive exams, honing your problem-solving skills, or simply looking to enhance your abilities in this field, our Power Electronics MCQs are designed to help you grasp the core concepts and excel in solving problems.

In this section, you'll find a wide range of Power Electronics mcq questions that explore various aspects of Power Electronics problems. Each MCQ is crafted to challenge your understanding of Power Electronics principles, enabling you to refine your problem-solving techniques. Whether you're a student aiming to ace Electronics and Communication Engineering tests, a job seeker preparing for interviews, or someone simply interested in sharpening their skills, our Power Electronics MCQs are your pathway to success in mastering this essential Electronics and Communication Engineering topic.

Note: Each of the following question comes with multiple answer choices. Select the most appropriate option and test your understanding of Power Electronics. You can click on an option to test your knowledge before viewing the solution for a MCQ. Happy learning!

So, are you ready to put your Power Electronics knowledge to the test? Let's get started with our carefully curated MCQs!

Power Electronics MCQs | Page 20 of 42

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Q191.
In a dual converter both converters work as rectifiers.
Discuss
Answer: (b).False
Q192.
A single phase full wave regulator feeds R-L load. The best gating signal is
Discuss
Answer: (c).pulse train
Q193.
A 3 phase induction motor is fed by a 3 phase ac regulator to change the stator voltage. The variation in speed will be more if
Discuss
Answer: (b).load torque increases with increase in speed
Q194.
A cycloconverter cannot give a frequency higher than input frequency.
Discuss
Answer: (b).False
Q195.
A thyristor has internal power dissipation of 40W and is operated at an ambient temperature of 20°C. If thermal resistance is 1.6° C/W, the junction temperature is
Discuss
Answer: (d).84° C
Q196.
In a single phase dual converter, ฮฑ1, and ฮฑ2 are firing angles of the two converters. Then
Discuss
Answer: (b).ฮฑ1 + ฮฑ2 = ฯ€
Q197.
The number of gates in an SCR is

a.

1

b.

3

c.

4

d.

6

Discuss
Answer: (a).1
Q198.
The waveshape of output voltage of half bridge inverter is
Discuss
Answer: (b).square
Q199.
A 3 phase induction motor is controlled by voltage and frequency control such that the ratio V/f is constant. At 50 Hz, the speed is 1440 rpm. At 25 Hz, the speed is likely to be
Discuss
Answer: (b).about 720 rpm
Q200.
The gate current required to turn on an SCR is
Discuss
Answer: (b).a few mA