Electronic Devices and Circuits MCQs

Welcome to our comprehensive collection of Multiple Choice Questions (MCQs) on Electronic Devices and Circuits, 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 Electronic Devices and Circuits 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 Electronic Devices and Circuits mcq questions that explore various aspects of Electronic Devices and Circuits problems. Each MCQ is crafted to challenge your understanding of Electronic Devices and Circuits 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 Electronic Devices and Circuits 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 Electronic Devices and Circuits. 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 Electronic Devices and Circuits knowledge to the test? Let's get started with our carefully curated MCQs!

Electronic Devices and Circuits MCQs | Page 29 of 82

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Q281.
The temperature of cathode is increased from 2500K to 2600K. The increase in thermionic emission current is about
Discuss
Answer: (d).150%
Q282.
Consider the following statement:

At finite temperature, magnetic dipoles in a material are randomly oriented giving low magnetization. When magnetic field H is applied, the magnetization?

1. Increases with H
2. Decreases with H
3. Decreases with temp for constant H

Which of the statement given above is/are correct?
Discuss
Answer: (d).1 and 3
Discuss
Answer: (c).low resistivity
Q284.
Eg is the band gap, A is pre-factor, k is Boltzmann constant? Which one of the following is the remaining grade of paper used in paper capacitor, besides the other two grade of paper-low and extra low loss?
Discuss
Answer: (b).Regular
Q285.
Barkhausen criterion of oscillation is
Discuss
Answer: (b).Aฮฒ = 1
Q286.
In a p-n-p transistor the main current carriers and the mechanism of flow respectively are
Discuss
Answer: (c).holes, diffusion
Q287.
Secondary emission occurs in
Discuss
Answer: (c).tetrode
Q288.
In common base connection, the output characteristics of a bipolar junction transistor is drawn between
Discuss
Answer: (a).IC and VCB
Q289.
In fabricating silicon BJT in ICs by the epitaxial process, the number of diffusions used is usually

a.

2

b.

3

c.

4

d.

6

Discuss
Answer: (d).6
Q290.
For generating 1 MHz frequency signal, the most suitable circuit is
Discuss
Answer: (c).colpitt's oscillator