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 11 of 44

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Q101.
In metals, the average drift velocity of electron per unit field is called mobility.

a.

True

b.

False

c.

May be True or False

d.

Can't say

Discuss
Answer: (a).True
Q102.
Ferrites have

a.

a low copper loss

b.

low eddy current loss

c.

low resistivity

d.

higher specific gravity compared to iron

Discuss
Answer: (b).low eddy current loss
Q103.
In intrinsic semiconductors, the number of free electrons is equal to the number of mobile holes.

a.

True

b.

False

c.

May be True or False

d.

Can't say

Discuss
Answer: (a).True
Q104.
Assertion (A): Relaxation time and mean time between collisions are equal when scattering is isotropic.

Reason (R): Mean free path of an electron ฮป, velocity of electron v and mean time between collisions tc are related as ฮป = vTc.

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: (b).Both A and R are true but R is not correct explanation of A
Q105.
Assertion (A): Copper is a monoatomic solid.

Reason (R): In a metal the valence electrons belong to all atoms.

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: (b).Both A and R are true but R is not correct explanation of A
Q106.
The heat developed per m³ per second (W) in a conductor having a conductivity ฯƒ and a field E is

a.

W = ฯƒE²

b.

W = ฯƒE

c.

W = E²/ฯƒ

d.

W = (ฯƒE)^0.5

Discuss
Answer: (a).W = ฯƒE²
Q107.
The number of valence electrons in acceptor impurity are

a.

5

b.

4

c.

3

d.

1

Discuss
Answer: (c).3
Q108.
If q is charge on an electron, R is radius of electron orbit and ฯ‰ is angular velocity of electron rotation, the magnetic dipole moment of electron in orbit is

a.

0.5 qฯ‰R

b.

0.5 q²ฯ‰²R²

c.

0.5 qฯ‰R²

d.

0.5 qฯ‰²R

Discuss
Answer: (c).0.5 qฯ‰R²
Q109.
In a homogeneous magnetic field H of a solenoid, the core carries a magnetic dipole moment M per unit volume equal to

a.

ฮผโ‚€ H

b.

ฮผแตฃ H

c.

(ฮผแตฃ - 1) H

d.

ฮผโ‚€ฮผแตฃ H

Discuss
Answer: (c).(ฮผแตฃ - 1) H
Q110.
The field pattern of a solenoid is similar to that of bar magnet.

a.

True

b.

False

c.

May be True or False

d.

Can't say

Discuss
Answer: (a).True
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