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 11 of 42

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Q101.
In 180° mode of operation of a 3 phase bridge inverter, two thyristors conduct at one time.

a.

True

b.

False

c.

May be True or False

d.

Can't say

Discuss
Answer: (b).False
Q102.
In a single phase full wave ac regulator the rms value of load current is 20 A load is purely resistive. Then

a.

average thyristor current will be less than 20 A but rms thyristor current will be more than 20 A

b.

both the average and rms thyristor currents will be less than 20 A

c.

both the average and rms thyristor currents will be more than 20 A

d.

rms thyristor current will be 20 A and average thyristor current will be 10 A

Discuss
Answer: (b).both the average and rms thyristor currents will be less than 20 A
Q103.
A reactor is used in a dual converter operating in non-circulating current mode.

a.

True

b.

False

c.

May be True or False

d.

Can't say

Discuss
Answer: (b).False
Q104.
In a 3 phase full wave regulator feeding resistance load connected in star, the possible range of firing angle ฮฑ is

a.

0 โ‰ค ฮฑ โ‰ค 180°

b.

0 โ‰ค ฮฑ โ‰ค 150°

c.

0 โ‰ค ฮฑ โ‰ค 120°

d.

0 โ‰ค ฮฑ โ‰ค 90°

Discuss
Answer: (b).0 โ‰ค ฮฑ โ‰ค 150°
Q105.
Assertion (A): A dual converter may be circulating current type or non circulating current type.

Reason (R): In circulating current dual converter only one converter can be operated at one time.

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: (c).A is correct but R is wrong
Q106.
Current chopping leads to

a.

over voltage

b.

over current

c.

both over voltage and over current

d.

either over voltage or over current

Discuss
Answer: (a).over voltage
Q107.
A 3 phase bridge inverter is fed by 400 V battery. The load is star connected and has a resistance of 10 ฮฉ per phase. The peak value of load current is

a.

40 A

b.

20 A

c.

10 A

d.

5 A

Discuss
Answer: (b).20 A
Q108.
In an SCR, the anode current is controlled by

a.

gate current only

b.

external circuit only

c.

both gate current and external circuit

d.

none of the above

Discuss
Answer: (b).external circuit only
Q109.
The rated current of a thyristor is 40 A. The holding current will be about :

a.

20 A

b.

1 A

c.

100 mA

d.

10 mA

Discuss
Answer: (d).10 mA
Q110.
A cycloconverter is

a.

ac-dc converter

b.

dc-ac converter

c.

dc-dc converter

d.

ac-ac converter

Discuss
Answer: (d).ac-ac converter
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