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 2 of 42

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Q11.
In a single phase full bridge converter (B - 2 connection), the input voltage is v = Vm sin ωt. The output dc voltage for resistive load

a.

A

b.

B

c.

C

d.

D

Discuss
Answer: (c).C
Q12.
In the below figure, the average value of load current is 15 A. The load is highly inductive. The peak value of thyristor current is

a.

15 A

b.

15√2 A

c.

15/√2 A

d.

30 A

Discuss
Answer: (a).15 A
Q13.
An n pulse rectifier is fed by a source having an inductance L. If load current is I₀, the voltage drop due to overlap is

a.

A

b.

B

c.

C

d.

D

Discuss
Answer: (a).A
Q14.
A 3 phase fully controlled bridge converter is fed by a 3 phase system having phase voltage v = Vm sin ωt. The firing angle is a. The dc output voltage is

a.

A

b.

B

c.

C

d.

D

Discuss
Answer: (a).A
Q15.
In the circuit of figure, the load current when thyristor is off

a.

is constant

b.

increases exponentially

c.

decreases exponentially

d.

zero

Discuss
Answer: (c).decreases exponentially
Q16.
In a step down chopper using time ratio control, the input voltage is V and duty cycle is α. The load is purely resistive having resistance R. The average and rms load currents are

a.

A

b.

B

c.

C

d.

D

Discuss
Answer: (b).B
Q17.
The symbol in figure is for

a.

SUS

b.

SBS

c.

SCS

d.

None of the above

Discuss
Answer: (c).SCS
Q18.
If a step down chopper is fed by a dc voltage V with Ton and Toff are on and off periods then following is

a.

average output voltage

b.

rms output voltage

c.

average or rms output voltage depending on load

d.

neither of the above

Discuss
Answer: (a).average output voltage
Q19.
In the circuit of figure, the waveshape of load current when thyristor conducting is

a.

constant

b.

increasing exponentially

c.

decreasing exponentially

d.

either (b) or (c)

Discuss
Answer: (b).increasing exponentially
Q20.
In figure, thyristor Th is in off state. When thyristor is turned on, the peak thyristor current can be

a.

5 A

b.

10 A

c.

15 A

d.

20 A

Discuss
Answer: (c).15 A
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