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 35 of 42

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Q341.
Inverters find applications in

a.

HVDC transmission

b.

UPS

c.

variable speed ac drives

d.

all of the above

Discuss
Answer: (d).all of the above
Q342.
When a thyristor is conducting, the voltage drop across it is about

a.

1 V

b.

10 V

c.

100 V

d.

0.1 V

Discuss
Answer: (a).1 V
Q343.
The use of free wheeling diode in controlled rectifier improves the waveshape of load current.

a.

True

b.

False

c.

May be True or False

d.

Can't say

Discuss
Answer: (a).True
Q344.
As the firing of a thyristor is delayed, the output voltage of a controlled rectifier decreases.

a.

True

b.

False

c.

May be True or False

d.

Can't say

Discuss
Answer: (a).True
Q345.
In a certain inverter circuit each thyristor carries 26.67 A for 60°, 13.33 A for 120° and zero A for 180° of the cycle. The rms current of thyristor is

a.

20 A

b.

13.33 A

c.

6.67 A

d.

3.33 A

Discuss
Answer: (b).13.33 A
Q346.
The factor ฮท for a UJT is about

a.

0.1

b.

0.2

c.

0.6

d.

0.9

Discuss
Answer: (c).0.6
Q347.
In a single phase full converter fed by a source having inductance, the number of thyristors conducting during overlap is

a.

1

b.

2

c.

3

d.

4

Discuss
Answer: (d).4
Q348.
The cut in voltages for germanium and silicon diodes respectively as

a.

0.3 V and 0.7 V

b.

0.7 V and 0.3 V

c.

0.6 V and 0.9 V

d.

0.5 V and 0.7 V

Discuss
Answer: (a).0.3 V and 0.7 V
Q349.
Assertion (A): A GTO can be turned on and turned off by gate pulses

Reason (R): A GTO can be turned off by negative gate pulse.

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
Q350.
In a full bridge single phase inverter feeding RLC load

a.

one thyristor and one diode conduct simultaneously

b.

two thyristors conduct simultaneously

c.

two thyristors or two diodes conduct simultaneously

d.

four thyristors conduct simultaneously

Discuss
Answer: (c).two thyristors or two diodes conduct simultaneously
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