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 33 of 44

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Q321.
As per temperature limits, the number of categories of solid dielectrics are

a.

7

b.

6

c.

8

d.

5

Discuss
Answer: (a).7
Q322.
At room temperature the number of conducting electrons in an intrinsic semiconductor

a.

is almost equal to the number of valence electrons

b.

is about half the number of valence electrons

c.

is small as compared to the number of valence electrons

d.

is a very small fraction of the number of valence electrons

Discuss
Answer: (d).is a very small fraction of the number of valence electrons
Q323.
Assertion (A): The angular momentum of an atom is due to three contributions viz. orbital, electron spin and nuclear spin.

Reason (R): The nuclear spin magnetic moment is much more than electron spin magnetic moment.

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: (c).A is true but R is false
Q324.
If WF is the Fermi level, then in a metal at T = 0

a.

all energy levels above WF filled, all those below WF are empty

b.

all energy levels below WF are filled, all those above WF are empty

c.

some energy levels, both below and above WF, are filled

d.

all energy levels below and above WF are filled

Discuss
Answer: (b).all energy levels below WF are filled, all those above WF are empty
Q325.
Silicon and germanium have diamond structure. The number of atoms in a volume equal to a³ where a is the edge of elementary cube are

a.

32

b.

16

c.

8

d.

4

Discuss
Answer: (c).8
Q326.
If the radius of electron cloud around the nucleus of a rare gas atom is R, the electronic polarizability of the atom is porportional to

a.

R

b.

R²

c.

R³

d.

1/R

Discuss
Answer: (c).R³
Q327.
By inserting a plate of dielectric between the plates of a parallel plate capacitor, the energy stored in the capacitor is increased five times. The dielectric constant of material is

a.

1/25

b.

1/5

c.

5

d.

25

Discuss
Answer: (c).5
Q328.
Debye temperature of metals is

a.

about 10 K

b.

about 200 K

c.

about 600 K

d.

about 2 K

Discuss
Answer: (b).about 200 K
Q329.
As the viscosity of a liquid increases, the relaxation time

a.

remains constant

b.

increases

c.

decreases

d.

first decreases then increases

Discuss
Answer: (b).increases
Q330.
A wire is carrying current I. The field intensity H at a distance r from the wire

a.

is directed towards wire

b.

is directed away from wire

c.

is tangential every where to a circle of radius r

d.

none of the above

Discuss
Answer: (c).is tangential every where to a circle of radius r
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