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 36 of 42

Discover more Topics under Electronics and Communication Engineering

Q351.
It is possible to use a freewheeling diode in

a.

single phase half wave controlled rectifier as well as in single phase full wave controlled rectifier (M - 2 connection)

b.

single phase half wave controlled rectifier but not in single phase full wave controlled rectifier (M - 2 connection)

c.

single phase full wave controlled rectifier (M - 2 connection) but not in single phase half wave controlled rectifier

d.

all controlled rectifier circuits

Discuss
Answer: (d).all controlled rectifier circuits
Q352.
Assertion (A): When the anode current of an SCR starts increasing during turn on process, the anode cathode voltage drop starts decreasing.

Reason (R): During turn on the reverse biased junction in SCR breaksdown.

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: (a).Both A and R are correct and R is correct explanation of A
Q353.
An SCR is triggered at 80° in the positive half cycle, only. The rms anode current is 25 A. If the firing angle is changed to 160°, the rms current is likely to be

a.

25 A

b.

12.5 A

c.

less than 25 A

d.

less than 12.5 A

Discuss
Answer: (d).less than 12.5 A
Q354.
The output wave of a cycloconverter consists of a number of segments derived from the input wave.

a.

True

b.

False

c.

May be True or False

d.

Can't say

Discuss
Answer: (a).True
Q355.
A class A chopper has an input voltage of 200 V. Ton = 1.5 ms and Toff = 4.5 ms. The duty cycle, average output voltage and ripple factor respectively are

a.

0.5, 100 V and 1

b.

0.25, 50 V and √3

c.

0.25, 50 V and 1

d.

0.5, 100 V and √3

Discuss
Answer: (b).0.25, 50 V and √3
Q356.
A TRIAC can be turned on :

a.

by applying a positive signal to gate

b.

by applying a negative signal to gate

c.

by applying either positive or negative signal to gate

d.

none of the above

Discuss
Answer: (c).by applying either positive or negative signal to gate
Q357.
In a half bridge inverter the gate pulses of the two thyristors have a phase displacement of

a.

60°

b.

90°

c.

120°

d.

180°

Discuss
Answer: (d).180°
Q358.
A fully controlled bridge converter can operate in quadrants

a.

1

b.

1 and 2

c.

1 and 3

d.

1 and 4

Discuss
Answer: (d).1 and 4
Q359.
A class E chopper

a.

can operate in second quadrant only

b.

can operate in first or third quadrant

c.

can operate in all the four quadrants

d.

can operate in either second or third quadrant

Discuss
Answer: (c).can operate in all the four quadrants
Q360.
A cycloconverter uses

a.

natural commutation

b.

forced commutation

c.

either natural or forced commutation

d.

both natural and forced commutation together

Discuss
Answer: (c).either natural or forced commutation
Page 36 of 42