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 4 of 42

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Q31.
The symbol in figure is for

a.

SUS

b.

SBS

c.

Shockley diode

d.

UJT

Discuss
Answer: (c).Shockley diode
Q32.
The turn on characteristics of a power transistor can be assumed to be linear, as shown in the below figure . During turn on time T, voltage reduces linearly from V to 0 and current rises linearly from 0 to I. The energy loss during time T is

a.

VIT

b.

VIT/2

c.

VIT/3

d.

VIT/6

Discuss
Answer: (d).VIT/6
Q33.
The circuit in figure is for

a.

resonant commutation

b.

self commutation

c.

load commutation

d.

auxiliary commutation

Discuss
Answer: (b).self commutation
Q34.
If 0.5 T is the time period of oscillations and Toff is the time between turn off of one thyristor and turn on of second thyristor, the frequency of output f of a series inverter is

a.

A

b.

B

c.

C

d.

D

Discuss
Answer: (a).A
Q35.
In auxiliary commutated chopper fed by voltage V and having L and C commutating elements, the peak value of capacitor current is

a.

A

b.

B

c.

C

d.

D

Discuss
Answer: (c).C
Q36.
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
Q37.
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
Q38.
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
Q39.
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
Q40.
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
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