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 33 of 42

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Q321.
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
Q322.
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
Q323.
A single phase half wave converter is feeding-a resistor load. The input voltage is v = Vm sin ฯ‰t. If firing angle is zero, the output dc voltage Vdc and output rms voltage Vrms respectively

a.

A

b.

B

c.

C

d.

D

Discuss
Answer: (b).B
Q324.
A single phase converter is fed by a source having an inductance L. If load current is Iโ‚€, the decrease in output voltage due to overlap is

a.

A

b.

B

c.

C

d.

D

Discuss
Answer: (c).C
Q325.
In a full bridge inverter fed by a battery of voltage V, the rms value of fundamental component of output voltage is

a.

A

b.

B

c.

C

d.

D

Discuss
Answer: (b).B
Q326.
Two single phase semi-converters are connected in series to form a series converter. The input is v = Vm sin ฯ‰t and ฮฑ1, ฮฑ2 are the firing angles. If ฮฑ1 = 0, the dc output voltage is

a.

A

b.

B

c.

C

d.

D

Discuss
Answer: (c).C
Q327.
A capacitor C farads is charged to a voltage V. It discharges through a thyristor, a diode and an inductance L. The peak current in the circuit is

a.

A

b.

B

c.

C

d.

D

Discuss
Answer: (b).B
Q328.
A dc chopper feeds an RLE load and has a duty cycle of 1. The load current will be such that

a.

A

b.

B

c.

C

d.

D

Discuss
Answer: (a).A
Q329.
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
Q330.
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
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