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 7 of 42

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Q61.
Assertion (A): The turn on time of SCR is about 1 to 4 ms.

Reason (R): The turn off time of SCR is about 10 to 300 ms.

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
Q62.
Which chopper circuit operates in all the 4 quadrants?

a.

A

b.

C

c.

D

d.

E

Discuss
Answer: (d).E
Q63.
A single phase cycloconverter feeds a resistance heating load. The heating power is provided by

a.

only the fundamental component of output wave

b.

only higher harmonics in the output wave

c.

both fundamental and higher harmonics in the output wave

d.

either (a) or (b)

Discuss
Answer: (c).both fundamental and higher harmonics in the output wave
Q64.
A voltage VBB is applied across the terminals of a UJT. The emitter voltage at peak point is

a.

hVBB

b.

(h + 1) VBB

c.

hVBB + VD

d.

VD

Discuss
Answer: (c).hVBB + VD
Q65.
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
Q66.
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
Q67.
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
Q68.
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
Q69.
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°
Q70.
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
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