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 27 of 42

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Q261.
A 3 phase series inverter has

a.

12 thyristors

b.

6 thyristors

c.

3 thyristors

d.

3 or 6 thyristors

Discuss
Answer: (b).6 thyristors
Q262.
HVDC systems are preferable for only long distances.

a.

True

b.

False

c.

May be True or False

d.

Can't say

Discuss
Answer: (a).True
Q263.
Surge current rating of an SCR is

a.

the maximum repetitive surge current in which the SCR can withstand

b.

the maximum non-repetitive surge current in which the SCR can withstand

c.

the maximum repetitive or non repetitive surge current in which the SCR can withstand

d.

the maximum surge current in which the SCR can withstand if both surge current and steady current exist together

Discuss
Answer: (b).the maximum non-repetitive surge current in which the SCR can withstand
Q264.
Which of the following devices has metal-silicon junction?

a.

General purpose power diode

b.

Schottky diode

c.

SCR

d.

MOSFET

Discuss
Answer: (b).Schottky diode
Q265.
In a series inverter

a.

the commutating elements L and C are in parallel

b.

the commutating elements L and C are in series with load

c.

the commutating L and C may be in series or parallel with the load

d.

none of the above

Discuss
Answer: (b).the commutating elements L and C are in series with load
Q266.
When a power diode is conducting, the voltage drop across it is about

a.

I V

b.

5 V

c.

20 V

d.

50 V

Discuss
Answer: (a).I V
Q267.
In thermal ohm's law, temperature and power loss are analogous to

a.

V and I respectively of ohm's law

b.

I and V respectively of ohm's law

c.

R and V respectively of ohm's law

d.

I and R respectively of ohm's law

Discuss
Answer: (b).I and V respectively of ohm's law
Q268.
A string of series connected thyristors needs equalising circuit to

a.

ensure proper firing

b.

ensure proper current division

c.

ensure proper voltage division

d.

none of the above

Discuss
Answer: (c).ensure proper voltage division
Q269.
A surge voltage

a.

has very high magnitude and very long duration

b.

has very high magnitude and very small duration

c.

has very high magnitude and very small duration and can be positive or negative

d.

can be only positive

Discuss
Answer: (c).has very high magnitude and very small duration and can be positive or negative
Q270.
The minimum gate current which can turn on SCR is called :

a.

trigger current

b.

holding current

c.

junction current

d.

breakover current

Discuss
Answer: (a).trigger current
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