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 5 of 42

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Q41.
A dc chopper feeds an RLE load and has a duty cycle of 1. The load current will be such that

a.

A

b.

B

c.

C

d.

D

Discuss
Answer: (a).A
Q42.
In a half bridge inverter circuit fed by a battery of voltage V, the rms value of fundamental component of output voltage is

a.

A

b.

B

c.

C

d.

D

Discuss
Answer: (b).B
Q43.
The symbol in figure is for

a.

UJT

b.

PUT

c.

Shockley diode

d.

TRIAC

Discuss
Answer: (a).UJT
Q44.
In a parallel inverter the turn off time tq of thyristor and values of commutating elements L and C are related as

a.

A

b.

B

c.

C

d.

D

Discuss
Answer: (c).C
Q45.
The symbol in figure is for

a.

SUS

b.

SBS

c.

SCS

d.

Shockley diode

Discuss
Answer: (b).SBS
Q46.
If peak value of input voltage is Vm and firing angle is ฮฑ, the average output voltage for single phase half wave and single phase full wave regulators are

a.

A

b.

B

c.

C

d.

D

Discuss
Answer: (a).A
Q47.
Assertion (A): The circuit of figure thyristor will conduct for 180° during positive half cycle if it is continuously fired.

Reason (R): A thyristor can conduct only when it is forward biased.

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: (d).A is wrong but R is correct
Q48.
In the below figure, the load is highly inductive. The firing angle is a for each of the thyristors. The periods of conduction of Th1 and Th2 respectively are

a.

0 to ฯ€ and ฯ€ to 2ฯ€

b.

ฮฑ to ฯ€ and ฯ€ + a to 2ฯ€

c.

ฮฑ to ฯ€ + ฮฑ and ฯ€ + ฯ€ to 2ฯ€ + ฮฑ

d.

ฮฑ to ฯ€ - ฮฑ and ฯ€ + ฮฑ to 2ฯ€ - ฮฑ

Discuss
Answer: (c).ฮฑ to ฯ€ + ฮฑ and ฯ€ + ฯ€ to 2ฯ€ + ฮฑ
Q49.
The condition for underdamped oscillations in a series RLC circuit is

a.

A

b.

B

c.

C

d.

D

Discuss
Answer: (b).B
Q50.
A single phase fully controlled bridge converter is fed by a voltage Vm sin ฯ‰t. The average and rms values of output voltage are

a.

A

b.

B

c.

C

d.

D

Discuss
Answer: (a).A
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