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.
In auxiliary commutated chopper, the peak value of thyristor current is

a.

equal to peak value of load current

b.

equal to peak value of capacitor current

c.

sum of peak value of load current and capacitor current

d.

none of the above

Discuss
Answer: (c).sum of peak value of load current and capacitor current
Q232.
The static equalisation circuit for thyristors connected in series is

a.

one resistor in series with each thyristor

b.

one resistor in parallel with each thyristor

c.

one resistor and one capacitor in parallel with each thyristor

d.

none of the above

Discuss
Answer: (b).one resistor in parallel with each thyristor
Q233.
The commutation method in an inverter, is

a.

line commutation

b.

forced commutation

c.

either (a) or (b)

d.

none of the above

Discuss
Answer: (c).either (a) or (b)
Q234.
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
Q235.
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
Q236.
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
Q237.
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
Q238.
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
Q239.
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
Q240.
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
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