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 10 of 42

Q91.
In a multiphase chopper, all choppers operate together.
Discuss
Answer: (b).False
Discuss
Answer: (b).source, gate, drain
Q93.
Assertion (A): The surge current which an SCR can withstand is much higher than rms on state current.

Reason (R): The duration of surge current is very small.
Discuss
Answer: (a).Both A and R are correct and R is correct explanation of A
Q94.
Current derating may be necessary when thyristors are operating in
Discuss
Answer: (b).parallel
Q95.
If duty cycle is a and the load is α resistance R, the rms value of output voltage is
Discuss
Answer: (b).√α V
Q96.
For a BJT, α = 0.98, then β =
Discuss
Answer: (d).49
Q97.
Assertion (A): Power transistor has lower switching time than SCR

Reason (R): Power transistor has greater switching time than SCR
Discuss
Answer: (d).A is wrong but R is correct
Q98.
A 3 kV circuit uses SCR of 800 V rating. If derating is 25%, the number of SCRs in series is

a.

4

b.

5

c.

6

d.

8

Discuss
Answer: (b).5
Q99.
The number of doped regions in a SCR is

a.

2

b.

3

c.

4

d.

5

Discuss
Answer: (c).4
Q100.
All inverters use forced commutation.
Discuss
Answer: (b).False