Materials and Components MCQs

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

Materials and Components MCQs | Page 32 of 44

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Q311.
A sample of N type semiconductor has an electron density of 6.25 x 10¹โธ/cm³ at 300 K. If intrinsic concentration of carriers in this sample is 2.5 x 10¹³/cm³ at this temperature, the hole density is

a.

10โถ / cm³

b.

10โธ / cm³

c.

10¹แดผ / cm³

d.

10¹² / cm³

Discuss
Answer: (b).10โธ / cm³
Q312.
Assertion (A): In a conductor, current density remains constant in time as long as E is constant.

Reason (R): In a conductor, J = ฯƒE.

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 correct explanation of A

c.

A is true but R is false

d.

A is false but R is true

Discuss
Answer: (a).Both A and R are true and R is correct explanation of A
Q313.
Hysteresis curve is associated with motion of domain walls.

a.

True

b.

False

c.

May be True or False

d.

Can't say

Discuss
Answer: (a).True
Q314.
The number of protons in germanium atom is

a.

4

b.

16

c.

28

d.

32

Discuss
Answer: (d).32
Q315.
Sulphur hexafluoride is used in

a.

transformers

b.

generators

c.

relays

d.

circuit breakers

Discuss
Answer: (d).circuit breakers
Q316.
The number of valence electrons in trivalent impurity is

a.

5

b.

4

c.

3

d.

1

Discuss
Answer: (c).3
Q317.
Soft iron is suitable for making temporary magnets.

a.

True

b.

False

c.

May be True or False

d.

Can't say

Discuss
Answer: (a).True
Q318.
Antiferromagnetic materials do not have permanent dipoles.

a.

True

b.

False

c.

May be True or False

d.

Can't say

Discuss
Answer: (b).False
Q319.
The Ohm's law for conduction in metals is

a.

J = ฯƒE

b.

J = E/ฯƒ

c.

J โˆ ฯƒE

d.

J โˆ E/s

Discuss
Answer: (a).J = ฯƒE
Q320.
The measurement of Hall coefficient of a semiconductor with one type of charge carriers gives the information about

a.

sign of charge carrier

b.

density of charge carrier

c.

both sign and density of charge carrier

d.

none of the above

Discuss
Answer: (c).both sign and density of charge carrier
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