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 7 of 42

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Q61.
A thyristor has a turn on time of 6 ฮผs. If the anode circuit is inductive, the turn on time will be
Discuss
Answer: (c).more than 6 ฮผs
Q62.
The total number of leads in reverse conducting thyristor is

a.

2

b.

3

c.

1

d.

4

Discuss
Answer: (b).3
Q63.
Assertion (A): A TRIAC is a bidirectional SCR.

Reason (R): A TRIAC is a four layers 3 terminal device and can conduct in both directions.
Discuss
Answer: (a).Both A and R are correct and R is correct explanation of A
Q64.
The value of capacitor C for dynamic equalising circuit of series connected thyristors is determined by
Discuss
Answer: (b).reverse recovery characteristics of thyristors
Discuss
Answer: (b).converts constant voltage dc into variable voltage dc directly
Q66.
Assertion (A): If the duty cycle of chopper is low the current would not become discontinuous

Reason (R): If the time constant L/R of the load in chopper is low the current may become discontinuous.
Discuss
Answer: (c).A is correct but R is wrong
Q67.
In a single phase full wave regulator, the firing angles in the positive and negative half cycles are generally
Discuss
Answer: (a).equal
Q68.
An electric heater is controlled by thyristors through on-off control. If ฮฑ = 0.4, the heating is
Discuss
Answer: (b).40% of maximum
Q69.
A single phase half wave controlled rectifier circuit has a free wheeling diode. The load is a combination of R and L. The firing angle is ฮฑ. The period of conduction of SCR and free wheeling diode respectively are
Discuss
Answer: (a).ฮฑ < ฯ‰t < ฯ€ and ฯ€ < ฯ‰t < (2ฯ€ + ฮฑ)
Q70.
In a half bridge inverter circuit 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