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 33 of 42

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Q321.
Which of the following commutation methods is the overall circuit under damped?

a.

Class A

b.

Class B

c.

Class C

d.

Both class A and Class B

Discuss
Answer: (d).Both class A and Class B
Q322.
Assertion (A): SUS is a PUT and avalanche diode connected between gate and cathode

Reason (R): SBS has two SUS inbuilt together and connected in anti-parallel

a.

Both A and R are correct and R is correct explanation of A

b.

Both A and R correct but R is not correct explanation of A

c.

A is correct but R is wrong

d.

A is wrong but R is correct

Discuss
Answer: (b).Both A and R correct but R is not correct explanation of A
Q323.
In a single phase full wave controlled rectifier using centre tap transformer, the voltage across each half of secondary is Vm sin ฯ‰t. The peak inverse voltage is

a.

2 Vm

b.

Vm

c.

0.5 Vm

d.

0.25 Vm

Discuss
Answer: (a).2 Vm
Q324.
Which statement is correct?

a.

BJT and MOSFET are current controlled devices

b.

BJT is voltage controlled and MOSFET is current controlled device

c.

BJT and MOSFET are voltage controlled devices

d.

BJT is current controlled and MOSFET is voltage controlled device

Discuss
Answer: (d).BJT is current controlled and MOSFET is voltage controlled device
Q325.
In a three phase series inverter, the firing frequency is

a.

three times output frequency

b.

six times output frequency

c.

twice the output frequency

d.

equal to output frequency

Discuss
Answer: (b).six times output frequency
Q326.
A 3 phase fully controlled converter is a

a.

3 pulse converter

b.

6 pulse converter

c.

2 pulse converter

d.

12 pulse converter

Discuss
Answer: (b).6 pulse converter
Q327.
A cycloconverter is a group of controlled rectifiers.

a.

True

b.

False

c.

May be True or False

d.

Can't say

Discuss
Answer: (a).True
Q328.
A single phase full wave regulator feeds a resistive load. The firing angle of thyristors is 90°. The input power factor is

a.

1

b.

0.707 lagging

c.

0.5 lagging

d.

0.2 lagging

Discuss
Answer: (b).0.707 lagging
Q329.
The leads in a TRIAC are denoted by

a.

anode cathode, gate

b.

T1 T2, gate

c.

T1, T2, anode

d.

T1, T2, T3

Discuss
Answer: (b).T1 T2, gate
Q330.
A step down cycloconverter has an input frequency f. If it uses natural commutation, the output frequency

a.

must be a sub-multiple of input frequency

b.

can be any frequency

c.

must be an even sub-multiple of input frequency

d.

must be an odd sub-multiple of input frequency

Discuss
Answer: (a).must be a sub-multiple of input frequency
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