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 29 of 42

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Q281.
A dc chopper is feeding an RLE load. The current can become discontinuous if

a.

R/L is high

b.

ฮฑ is low

c.

E is high

d.

none of the above

Discuss
Answer: (d).none of the above
Q282.
Which of these commutation methods uses two leads?

a.

Class A

b.

Class B

c.

Class C

d.

Class D

Discuss
Answer: (d).Class D
Q283.
In rectifier circuits, the rms value of ac component of output voltage is equal to

a.

Vrms

b.

0.5 Vrms

c.

(Vrms - Vdc)²0.5

d.

(Vrms² - Vdc²)^0.5

Discuss
Answer: (d).(Vrms² - Vdc²)^0.5
Q284.
A UJT exhibits negative resistance characteristics when

a.

Current is less than valley current

b.

Current is less than peak current

c.

Current is more than peak current but less than valley current

d.

None of the above

Discuss
Answer: (c).Current is more than peak current but less than valley current
Q285.
In rectifier circuits, ripple factor RF and form factor FF are related as

a.

RF = (FF² - 1)^0.5

b.

RF = FF

c.

RF = FF - 1

d.

RF = (FF - 1)^0.5

Discuss
Answer: (a).RF = (FF² - 1)^0.5
Q286.
If we connect two silicon unilateral switches in anti- parallel we get

a.

SCR

b.

SBS

c.

SCS

d.

UJT

Discuss
Answer: (b).SBS
Q287.
A single phase half wave rectifier is feeding a resistive load. As firing angle is increased

a.

dc output voltage and rms output voltage decrease in the same proportion

b.

dc output voltage and rms output voltage decrease

c.

dc output voltage and rms output voltage increase

d.

dc output voltage and rms output voltage increase in the same proportion

Discuss
Answer: (b).dc output voltage and rms output voltage decrease
Q288.
A cycloconverter for single phase operation has

a.

one positive group and one negative group converters

b.

two positive group and two negative group converters

c.

three positive group and three negative group converters

d.

any of the above

Discuss
Answer: (a).one positive group and one negative group converters
Q289.
A chopper is a high efficiency circuit.

a.

True

b.

False

c.

May be True or False

d.

Can't say

Discuss
Answer: (a).True
Q290.
The difference between resonant commutation and self commutation is

a.

both these methods are based on entirely different principles

b.

in resonant commutation, the commutating elements carry load current but in self commutation, the commutating elements do not carry load current

c.

resonant commutation uses L and C but self commutation uses only capacitor

d.

none of the above

Discuss
Answer: (a).both these methods are based on entirely different principles
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