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 10 of 44

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Q91.
Assertion (A): CO₂ has no resultant dipole moment but CO has a dipole moment.
Reason (R): The structure of CO₂ is O = C = O.

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
Q92.
For a photoconductor with equal electron and hole mobilities and perfect ohmic contacts at the ends, an increase in intensity of optical illumination results in

a.

a change in o.c voltage

b.

a change in s.c current

c.

decrease in resistance

d.

increase in resistance

Discuss
Answer: (c).decrease in resistance
Q93.
A permeable substance is one

a.

which is strong magnet

b.

which is a weak magnet

c.

which is a good conductor

d.

through which magnetic lines of force can pass easily

Discuss
Answer: (d).through which magnetic lines of force can pass easily
Q94.
When subjected to alternating stresses, an insulating material is characterised by complex dielectric constant ∈'r - j∈"r . In such materials, the dielectric losses under alternating stress is proportional

a.

∈"r

b.

both ∈'r and ∈"r

c.

∈'r

d.

(∈"r)2

Discuss
Answer: (a).∈"r
Q95.
In carbon resistor colour code, the third band is red. It indicates

a.

two zeros

b.

three zeros

c.

multiplier is 0.01

d.

multiplier is 0.1

Discuss
Answer: (a).two zeros
Q96.
Rochelle salt is a ferroelectric material.

a.

True

b.

False

c.

May be True or False

d.

Can't say

Discuss
Answer: (a).True
Q97.
Paramagnetic materials have permanent magnetic dipoles but interaction between neighbouring dipoles is negligible.

a.

True

b.

False

c.

May be True or False

d.

Can't say

Discuss
Answer: (a).True
Q98.
Assertion (A): If difference between static and optical dielectric constant is high, the mechanical compressiblity of that material is also high.
Reason (R): For soft ions, ionic polarization per unit field is higher than that of hard 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
Q99.
In crystalline solids, atoms are stacked in a regular manner.

a.

True

b.

False

c.

May be True or False

d.

Can't say

Discuss
Answer: (a).True
Q100.
The temperature below which certain materials are antiferromagnetic and above which they are paramagnetic is called

a.

Weiss temperature

b.

Curie temperature

c.

Neel temperature

d.

None of the above

Discuss
Answer: (c).Neel temperature
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