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 34 of 42

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Q331.
A single phase fully controlled bridge converter is fed by a voltage Vm sin ฯ‰t. The average and rms values of output voltage are

a.

A

b.

B

c.

C

d.

D

Discuss
Answer: (a).A
Q332.
Which of the following is correct for a BJT?

a.

A

b.

B

c.

C

d.

D

Discuss
Answer: (a).A
Q333.
A fully controlled bridge converter is feeding an RLE load. The load current is Iโ‚€. The input voltage is Vm sin ฯ‰t. The KVL equation to find firing angle ฮฑ is

a.

A

b.

B

c.

C

d.

D

Discuss
Answer: (a).A
Q334.
The duty cycle of a step down chopper is

a.

A

b.

B

c.

C

d.

D

Discuss
Answer: (a).A
Q335.
A rectifier is fed by a transformer. The rms voltage and current at secondary of transformer are Vs and Is. Output dc power is Vdc Idc and output ac power is (Vrms ) (Irms), Transformer utilisation factor TUF is

a.

A

b.

B

c.

C

d.

D

Discuss
Answer: (a).A
Q336.
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
Q337.
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)
Q338.
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
Q339.
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
Q340.
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
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