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 31 of 42

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Q301.
A fully controlled bridge converter feeds a highly inductive load such that the load current can be assumed to be constant. The wave shape of input current is

a.

dc

b.

sinusoidal

c.

rectangular

d.

none of the above

Discuss
Answer: (c).rectangular
Q302.
A static excitation system uses

a.

transformer and thyristors

b.

transformer and ac exciter

c.

dc exciter and ac exciter

d.

transformer and dc exciter

Discuss
Answer: (a).transformer and thyristors
Q303.
The application of gate signal decreases the break over voltage of on SCR.

a.

True

b.

False

c.

May be True or False

d.

Can't say

Discuss
Answer: (a).True
Q304.
The power factor at the input terminals of a cyclo- converter is generally

a.

low and leading

b.

low and lagging

c.

high and leading

d.

high and lagging

Discuss
Answer: (b).low and lagging
Q305.
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
Q306.
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
Q307.
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
Q308.
A single phase series converter is used for

a.

high voltage output

b.

high current output

c.

high voltage and high current output

d.

improving the circuit efficiency

Discuss
Answer: (a).high voltage output
Q309.
Which of these commutation methods uses an auxiliary SCR?

a.

Class A

b.

Class B

c.

Class C

d.

Class D

Discuss
Answer: (c).Class C
Q310.
In integral cycle control the period of on-off control should be more than mechanical time constant of load.

a.

True

b.

False

c.

May be True or False

d.

Can't say

Discuss
Answer: (b).False
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