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!

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Electronic Devices and Circuits MCQs | Page 16 of 82

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Q151.
At room temperature a semiconductor material is

a.

perfect insulator

b.

conductor

c.

slightly conducting

d.

any of the above

Discuss
Answer: (c).slightly conducting
Q152.
The threshold voltage of an n-channel enhancement mode MOSFET is 0.5 when the device is biased at a gate voltage of 3V. Pinch off would occur at a drain voltage of

a.

1.5 V

b.

2.5 V

c.

3.5 V

d.

4.5 V

Discuss
Answer: (b).2.5 V
Q153.
Which of these has degenerate p and n materials?

a.

Zener diode

b.

PIN diode

c.

Tunnel diode

d.

Photo diode

Discuss
Answer: (c).Tunnel diode
Q154.
A Schottky diode clamp is used along with switching BJT for

a.

reducing the power dissipation

b.

reducing the switching time

c.

increasing the value of ฮฒ

d.

reducing the base current

Discuss
Answer: (b).reducing the switching time
Q155.
In a piezoelectric crystal, applications of a mechanical stress would produce

a.

plastic deformation of the crystal

b.

magnetic dipoles in the crystal

c.

electrical polarization in the crystal

d.

shift in the Fermi level

Discuss
Answer: (c).electrical polarization in the crystal
Q156.
What is the correct sequence of the following step in the fabrication of a monolithic, Bipolar junction transistor? Emitter diffusionBase diffusionBuried layer formationE pi-layer formation Select the correct answer using the codes given below:

a.

3, 4, 1, 2

b.

4, 3, 1, 2

c.

3, 4, 2, 1

d.

4, 3, 2, 1

Discuss
Answer: (d).4, 3, 2, 1
Q157.
Calculate the resistivity of n-type semiconductor from the following data, Density of holes = 5 x 1012 cm-3. Density of electrons = 8 x 1013 cm-3, mobility of conduction electron = 2.3 x 104 cm²/ V-sec and mobility of holes = 100 cm²/V-sec.

a.

0.43 ฮฉ-m

b.

0.34 ฮฉ-m

c.

0.42 ฮฉ-m

d.

0.24 ฮฉ-m

Discuss
Answer: (b).0.34 ฮฉ-m
Q158.
A semiconductor diode is biased in forward direction and carrying current I. The current due to holes in p material is

a.

I

b.

0

c.

less than I

d.

0.5

Discuss
Answer: (c).less than I
Q159.
Between which regions does BJT act like switch?

a.

Cut off and saturation

b.

Cut off and forward active

c.

Forward active and cut off

d.

Saturation and active

Discuss
Answer: (a).Cut off and saturation
Q160.
Assertion (A): When a photoconductive device is exposed to light, its bulk resistance increases.

Reason (R): When exposed to light, electron hole pairs are generated in the photoconductive device.

a.

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

b.

Both A and R are true but R is not a correct explanation of A

c.

A is true but R is false

d.

A is false but R is true

Discuss
Answer: (d).A is false but R is true
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