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 38 of 42

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Q371.
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
Q372.
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
Q373.
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
Q374.
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
Q375.
The number of leads in a DIAC are

a.

2

b.

3

c.

4

d.

6

Discuss
Answer: (a).2
Q376.
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
Q377.
Assertion (A): A class C chopper can operate in first and second quadrants

Reason (R): A class B chopper operates only in second quadrant.

a.

Both A and R are correct and R is correct explanation of A

b.

Both A and R correct but R is not correct explanation of A

c.

A is correct but R is wrong

d.

A is wrong but R is correct

Discuss
Answer: (b).Both A and R correct but R is not correct explanation of A
Q378.
A single phase dual converter consists of

a.

two fully controlled converters connected in parallel

b.

two fully controlled converters connected in antiparallel

c.

two fully controlled semiconverters connected in antiparallel

d.

two fully controlled semiconverters connected in parallel

Discuss
Answer: (b).two fully controlled converters connected in antiparallel
Q379.
The snubber circuit consists of

a.

a capacitor connected in series with thyristor

b.

a capacitor connected in parallel with thyristor

c.

a resistor and capacitor in series connected across thyristor

d.

none of the above

Discuss
Answer: (c).a resistor and capacitor in series connected across thyristor
Q380.
The effect of source inductance in a 3 phase fully controlled bridge converter is to

a.

decrease the output voltage

b.

increase the output voltage

c.

decrease the output voltage and increase the output current

d.

increase the output voltage and decrease the output current

Discuss
Answer: (a).decrease the output voltage
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