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 26 of 42

Discover more Topics under Electronics and Communication Engineering

Q251.
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 thyristor current is

a.

400/10 A

b.

400/15 A

c.

400/20 A

d.

400/30 A

Discuss
Answer: (b).400/15 A
Q252.
The main utility of SCR is due to

a.

gate triggering

b.

high temperature triggering

c.

dv/dt triggering

d.

high breakdown voltage

Discuss
Answer: (a).gate triggering
Q253.
In a single phase full wave ac regulator the firing angles during both half cycles are equal.

a.

True

b.

False

c.

May be True or False

d.

Can't say

Discuss
Answer: (a).True
Q254.
In a 3 phase full wave regulator feeding a star connected resistance load, firing angle is 75°. Then the number of thyristors conducting at one time is

a.

1

b.

2

c.

3

d.

4

Discuss
Answer: (b).2
Q255.
In a single phase full wave ac regulator using two thyristors only, the gate circuits of the two thyristors

a.

must be isolated

b.

may or may not be isolated

c.

should be preferably, isolated

d.

should not be isolated

Discuss
Answer: (a).must be isolated
Q256.
In a single phase half wave converter feeding resistive load and full wave converter (M - 2 connection) feeding a resistive load the circuit conditions are similar. The firing angle is ฮฑ. Then the waveshapes of voltages across thyristors

a.

are similar

b.

are not similar

c.

may be similar or dissimilar

d.

are similar only for some values of ฮฑ

Discuss
Answer: (a).are similar
Q257.
In a 3 phase full converter feeding a highly inductive load, the average load current is 150 A. The peak current through thyristor is

a.

150 A

b.

75 A

c.

50 A

d.

300 A

Discuss
Answer: (a).150 A
Q258.
Multiphase choppers are used in

a.

low power circuits

b.

high power circuit

c.

both low and high power circuits

d.

medium power circuits

Discuss
Answer: (b).high power circuit
Q259.
In a single phase converter using a centre tapped transformer and with a highly inductive load, the firing angles is ฮฑ. Each thyristor conducts for a period

a.

ฯ€

b.

ฮฑ

c.

ฯ€ - ฮฑ

d.

ฯ€/2

Discuss
Answer: (a).ฯ€
Q260.
In a parallel inverter

a.

each thyristor is turned on twice during each cycle

b.

each thyristor is turned on once during each cycle

c.

each thyristor is turned on either once or twice in each load cycle

d.

each thyristor may be turned on upto four times in each load cycle

Discuss
Answer: (a).each thyristor is turned on twice during each cycle
Page 26 of 42