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 14 of 44

Discover more Topics under Electronics and Communication Engineering

Q131.
For a multiplate capacitor having n plates, A as area of each plate, the capacitance is proportional to

a.

n A

b.

(n - 1) A

c.

(n + 1) A

d.

nA/2

Discuss
Answer: (b).(n - 1) A
Q132.
The orientation polarization is

1. directly proportional to temperature
2. inversely proportional to temperature
3. inversely proportional to square of permanent dipole moment
4. directly proportional to square of permanent dipole moment.

Which of the above are correct?

a.

1 and 3 only

b.

2 and 3 only

c.

1 and 4 only

d.

2 and 4 only

Discuss
Answer: (d).2 and 4 only
Q133.
The relaxation time of electrons in a metal is of the order of

a.

10^-6 secs

b.

10^-10 secs

c.

10^-14 secs

d.

10^-20 secs

Discuss
Answer: (c).10^-14 secs
Q134.
Assertion (A): For elemental dielectrics, P = NaeEi where N is number of atoms/m³, P is polarization, ae is electronic polarization and Ei is internal electric field.

Reason (R): In elemental dielectrics there are no permanent dipoles or ions.

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
Q135.
The circumference of an electron orbit is equal to integer times the wavelength of electron.

a.

True

b.

False

c.

May be True or False

d.

Can't say

Discuss
Answer: (a).True
Q136.
In a specimen of silicon steel, a field strength of 200 A/m causes a flux density of 0.5 T. In a specimen of cast iron, the same H would cause B to be

a.

0.5 T

b.

less than 0.5 T

c.

more than 0.5 T

d.

0.5 T or more or less

Discuss
Answer: (b).less than 0.5 T
Q137.
In a rare gas, the molecules of some atoms have an excess positive or negative charge. The electric field tends to shift positive ions relative to negative ions. This is known as ionic polarization.

a.

True

b.

False

c.

May be True or False

d.

Can't say

Discuss
Answer: (a).True
Q138.
Thermistor is used in

a.

temperature measurement

b.

temperature control

c.

high temperature alarm circuits of devices

d.

all of the above

Discuss
Answer: (d).all of the above
Q139.
Nichrome is used for

a.

overhead line wires

b.

heater coils

c.

lamp filaments

d.

all of the above

Discuss
Answer: (b).heater coils
Q140.
The electric dipole moment of a neutral system of point charges Q1, Q2.... is ∑Qiri . The charges Qi

a.

must be all positive

b.

must be all negative

c.

must be such that ∑Qi = 0

d.

either (a) or (b)

Discuss
Answer: (c).must be such that ∑Qi = 0
Page 14 of 44