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 13 of 42

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Q121.
A single phase bridge type cycloconverter uses eight thyristors.

a.

True

b.

False

c.

May be True or False

d.

Can't say

Discuss
Answer: (a).True
Q122.
In the basic series inverter circuit, the source supplies load

a.

only in positive half cycle

b.

both in positive and negative half cycles

c.

only in part of positive half cycle

d.

in positive half cycle and part of negative half cycle

Discuss
Answer: (a).only in positive half cycle
Q123.
In a 3 phase bridge inverter with 180° mode of operation the numbers of thyristors conducting at one time are

a.

1

b.

2

c.

3

d.

4

Discuss
Answer: (c).3
Q124.
A single phase full converter can operate in

a.

4 quadrants

b.

3 quadrants

c.

2 quadrants

d.

1 quadrant

Discuss
Answer: (c).2 quadrants
Q125.
In a 3 phase semiconverter, the freewheeling diode comes into operation only if firing angle

a.

is zero

b.

is 60°

c.

is more than 60°

d.

is more than 90°

Discuss
Answer: (c).is more than 60°
Q126.
A full bridge inverter is fed by a battery of 30 V. The rms value of output voltage is

a.

15 V

b.

15√2 V

c.

30 V

d.

30√2 V

Discuss
Answer: (c).30 V
Q127.
The total number of leads in SUS, SBS and SCS respectively are

a.

3, 3, 4,

b.

3, 3, 3

c.

2, 3, 3

d.

3, 3, 5

Discuss
Answer: (a).3, 3, 4,
Q128.
The average load current supplied by a thyristor depends on

a.

firing angle

b.

firing frequency

c.

magnitude of gate current

d.

all of the above

Discuss
Answer: (a).firing angle
Q129.
In a 3 phase full wave regulator feeding a star connected resistance load the input voltage is 400 V line to line. The firing angle is 160°. The line to line output voltage would be

a.

400 V

b.

about 100 V

c.

about 20 V

d.

zero

Discuss
Answer: (d).zero
Q130.
A thyristor is reverse biased. A positive gate pulse is applied. The thyristor

a.

will be turned on

b.

may or may not turn on

c.

will not turn on

d.

will turn on after sometime

Discuss
Answer: (c).will not turn on
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