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 24 of 42

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Q231.
A single phase full converter can operate in

a.

4 quadrants

b.

3 quadrants

c.

2 quadrants

d.

1 quadrant

Discuss
Answer: (c).2 quadrants
Q232.
In a 3 phase semiconverter, the freewheeling diode comes into operation only if firing angle

a.

is zero

b.

is 60°

c.

is more than 60°

d.

is more than 90°

Discuss
Answer: (c).is more than 60°
Q233.
A full bridge inverter is fed by a battery of 30 V. The rms value of output voltage is

a.

15 V

b.

15√2 V

c.

30 V

d.

30√2 V

Discuss
Answer: (c).30 V
Q234.
The total number of leads in SUS, SBS and SCS respectively are

a.

3, 3, 4,

b.

3, 3, 3

c.

2, 3, 3

d.

3, 3, 5

Discuss
Answer: (a).3, 3, 4,
Q235.
Which of these devices can conduct in both directions?

a.

SCR

b.

SUS

c.

SBS

d.

UJT

Discuss
Answer: (c).SBS
Q236.
Assertion (A): A half wave controlled rectifier has poorer efficiency and higher ripple factor than a full wave controlled rectifier.

Reason (R): The use of a freewheeling diode in half wave controlled rectifier circuit improves the waveform of load current and circuit power factor.

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
Q237.
A 3 phase dual converter consists of

a.

two 3 phase semiconverters connected in parallel

b.

two 3 phase semiconverters connected in antiparallel

c.

two 3 phase full converters connected in antiparallel

d.

two 3 phase full converters connected in parallel

Discuss
Answer: (c).two 3 phase full converters connected in antiparallel
Q238.
Which inverter circuit uses coupled inductors?

a.

Modified McMurray full bridge inverter

b.

McMurray Bedford half bridge inverter

c.

Modified McMurray Bedford half bridge inverter

d.

Both (b) and (c)

Discuss
Answer: (d).Both (b) and (c)
Q239.
If the frequency is less than the damped frequency in a series- inverter

a.

the distortion of output voltage waveform is low

b.

the distortion of output voltage waveform is high

c.

the distortion of output voltage may be high or low depending on the load impedance

d.

none of the above

Discuss
Answer: (b).the distortion of output voltage waveform is high
Q240.
The output frequency of a cycloconverter can be changed by changing the firing angle.

a.

True

b.

False

c.

May be True or False

d.

Can't say

Discuss
Answer: (b).False
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