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

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Q241.
In a series inverter

a.

the commutating elements L and C are in parallel

b.

the commutating elements L and C are in series with load

c.

the commutating L and C may be in series or parallel with the load

d.

none of the above

Discuss
Answer: (b).the commutating elements L and C are in series with load
Q242.
When a power diode is conducting, the voltage drop across it is about

a.

I V

b.

5 V

c.

20 V

d.

50 V

Discuss
Answer: (a).I V
Q243.
In thermal ohm's law, temperature and power loss are analogous to

a.

V and I respectively of ohm's law

b.

I and V respectively of ohm's law

c.

R and V respectively of ohm's law

d.

I and R respectively of ohm's law

Discuss
Answer: (b).I and V respectively of ohm's law
Q244.
A string of series connected thyristors needs equalising circuit to

a.

ensure proper firing

b.

ensure proper current division

c.

ensure proper voltage division

d.

none of the above

Discuss
Answer: (c).ensure proper voltage division
Q245.
A surge voltage

a.

has very high magnitude and very long duration

b.

has very high magnitude and very small duration

c.

has very high magnitude and very small duration and can be positive or negative

d.

can be only positive

Discuss
Answer: (c).has very high magnitude and very small duration and can be positive or negative
Q246.
The circuit in figure is for

a.

resonant commutation

b.

line commutation

c.

auxiliary commutation

d.

complementary commutation

Discuss
Answer: (d).complementary commutation
Q247.
The symbol in figure is for

a.

SUS

b.

SBS

c.

Shockley diode

d.

UJT

Discuss
Answer: (c).Shockley diode
Q248.
The turn on characteristics of a power transistor can be assumed to be linear, as shown in the below figure . During turn on time T, voltage reduces linearly from V to 0 and current rises linearly from 0 to I. The energy loss during time T is

a.

VIT

b.

VIT/2

c.

VIT/3

d.

VIT/6

Discuss
Answer: (d).VIT/6
Q249.
The circuit in figure is for

a.

resonant commutation

b.

self commutation

c.

load commutation

d.

auxiliary commutation

Discuss
Answer: (b).self commutation
Q250.
If 0.5 T is the time period of oscillations and Toff is the time between turn off of one thyristor and turn on of second thyristor, the frequency of output f of a series inverter is

a.

A

b.

B

c.

C

d.

D

Discuss
Answer: (a).A
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