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 39 of 44

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Q381.
The merger of hole and free electron is called

a.

covalent bonding

b.

recombination

c.

thermal energy

d.

free electrons

Discuss
Answer: (b).recombination
Q382.
The elements which become superconducting at extremely low temperatures are

a.

good conductors at room temperature

b.

ferromagnetic at room temperature

c.

relatively poor conductors at room temperature

d.

insulators at room temperature

Discuss
Answer: (c).relatively poor conductors at room temperature
Q383.
Electrical contact materials used in switches, brushes, relay must possess

a.

high thermal conductivity and high melting point

b.

low thermal conductivity and low melting point

c.

high thermal conductivity and low melting point

d.

low thermal conductivity and high melting point

Discuss
Answer: (a).high thermal conductivity and high melting point
Q384.
The phenomenon of dielectric hysteresis occurs with

a.

dc

b.

ac

c.

both ac and dc

d.

none of the above

Discuss
Answer: (b).ac
Q385.
The induced magnetic dipole moment is independent of the permanent magnetic dipole moment.

a.

True

b.

False

c.

May be True or False

d.

Can't say

Discuss
Answer: (a).True
Q386.
The number of protons in a silicon atom are

a.

4

b.

8

c.

12

d.

14

Discuss
Answer: (d).14
Q387.
The fact that domains exhibits spontaneous magnetisation is

a.

first hypothesis is of Curie

b.

second hypothesis is of Weiss

c.

Curie-Weiss law

d.

Boltzmann's statistics

Discuss
Answer: (b).second hypothesis is of Weiss
Q388.
Assertion (A): Hall effect is used to determine whether the semi- conductor is p or n type.

Reason (R): Under the influence of field, holes and electrons move in opposite direction.

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
Q389.
The most important set of specifications of transformer oil include

a.

dielectric strength and viscosity

b.

dielectric strength and flash point

c.

viscosity and flash point

d.

flash point and viscosity

Discuss
Answer: (a).dielectric strength and viscosity
Q390.
Nickel is a non-magnetic material.

a.

True

b.

False

c.

May be True or False

d.

Can't say

Discuss
Answer: (b).False
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