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 36 of 42

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Q351.
An ideal rectifier should have

a.

100% efficiency, zero ripple factor, zero harmonic factor and unity displacement factor

b.

100% efficiency, zero tipple factor, zero harmonic factor and zero displacement factor

c.

100% efficiency, zero ripple factor, unity harmonic factor and unity displacement factor

d.

100% efficiency, unity ripple factor, zero harmonic factor and unity displacement factor

Discuss
Answer: (a).100% efficiency, zero ripple factor, zero harmonic factor and unity displacement factor
Q352.
When thyristors are connected in parallel, the current distribution may become non-uniform due to

a.

inductive effect of current carrying conductors

b.

capacitive effect of current carrying conductors

c.

both inductive and capacitive effects

d.

none of the above

Discuss
Answer: (a).inductive effect of current carrying conductors
Q353.
As compared to a p-n junction diode

a.

a schottky diode has lower cut in voltage and lower reverse saturation current

b.

a schottky diode has higher cut in voltage and higher reverse saturation current

c.

a Schottky diode has lower cut in voltage and higher reverse saturation current

d.

a schottky diode has higher cut in voltage and lower reverse saturation current

Discuss
Answer: (c).a Schottky diode has lower cut in voltage and higher reverse saturation current
Q354.
From which instant is the turn off time of a thyristor defined

a.

when anode voltage becomes zero

b.

when anode current becomes zero

c.

when both anode voltage and current become zero

d.

none of the above

Discuss
Answer: (b).when anode current becomes zero
Q355.
In a single phase cycloconverter with centre tapped transformer

a.

all thyristors carry currents for equal duration

b.

the durations of currents in all thyristors may or may not be equal

c.

the durations of currents in all thyristors cannot be equal

d.

the duration of currents in all thyristors must be equal for satisfactory operation

Discuss
Answer: (b).the durations of currents in all thyristors may or may not be equal
Q356.
Thyristors can be used for control of

a.

dc separately excited motor

b.

dc shunt motor

c.

dc series motor

d.

all of the above

Discuss
Answer: (d).all of the above
Q357.
A crowbar circuit is generally needed for protection under fault conditions.

a.

True

b.

False

c.

May be True or False

d.

Can't say

Discuss
Answer: (a).True
Q358.
Forward dv/dt rating of an SCR is

a.

the maximum rate of rise of anode voltage which will trigger the SCR

b.

the maximum rate of rise of anode voltage which will not trigger the SCR if gate signal is applied

c.

the maximum rate of rise of anode voltage which will not trigger the SCR if gate signal is not applied

d.

either (b) or (c)

Discuss
Answer: (c).the maximum rate of rise of anode voltage which will not trigger the SCR if gate signal is not applied
Q359.
The number of leads in a DIAC are

a.

2

b.

3

c.

4

d.

6

Discuss
Answer: (a).2
Q360.
The method of triggering SCS is

a.

application of positive pulse at cathode gate or negative pulse at anode gate

b.

application of pulse at anode gate

c.

application of pulse at cathode gate

d.

application of low voltage at anode

Discuss
Answer: (a).application of positive pulse at cathode gate or negative pulse at anode gate
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