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 25 of 42

Discover more Topics under Electronics and Communication Engineering

Q241.
Mc Murray full bridge inverter uses

a.

4 thyristors and 2 diodes

b.

4 thyristors and 4 diodes

c.

8 thyristors and 4 diodes

d.

8 thyristors and 8 diodes

Discuss
Answer: (c).8 thyristors and 4 diodes
Q242.
Assertion (A): A DIAC has four layers but only two terminals.

Reason (R): A DIAC can conduct in both directions.

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
Q243.
In a 3 phase full converter, the instantaneous output voltage can have negative part if

a.

firing angle is less than 60°

b.

firing angle is less than 90°

c.

firing angle is more than 60°

d.

firing angle is more than 90°

Discuss
Answer: (c).firing angle is more than 60°
Q244.
A single phase half bridge inverter required to feed R-L loads needs

a.

2 thyristors

b.

4 thyristors

c.

2 thyristors and two diodes

d.

4 thyristors and 4 diodes

Discuss
Answer: (c).2 thyristors and two diodes
Q245.
Typical values of di/dt (A/µ sec) and dv/dt (v/µ sec) for an SCR are in the range of

a.

1 to 10

b.

25 to 500

c.

0.1 to 1

d.

1000 to 2000

Discuss
Answer: (b).25 to 500
Q246.
When a dc chopper feeds an RLE load, the load current, during steady state operation

a.

remains constant

b.

varies between maximum and minimum values

c.

may remain constant or vary

d.

is constant if R is constant

Discuss
Answer: (b).varies between maximum and minimum values
Q247.
When an SCR is in forward blocking mode, the applied voltage

a.

appears across only one junction

b.

is equally shared by two junctions

c.

is equally shared by three junctions

d.

may appear across one or more junctions

Discuss
Answer: (a).appears across only one junction
Q248.
In sinusoidal PWM for inverters the width of different pulses are not the same.

a.

True

b.

False

c.

May be True or False

d.

Can't say

Discuss
Answer: (a).True
Q249.
A class D chopper

a.

can operate in first quadrant only

b.

can operate in second quadrant only

c.

can operate in either first or fourth quadrant

d.

can operate in all the quadrants

Discuss
Answer: (c).can operate in either first or fourth quadrant
Q250.
The efficiency of a chopper circuit is about

a.

80% or more

b.

around 50%

c.

around 20%

d.

around 5%

Discuss
Answer: (a).80% or more
Page 25 of 42