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.
The magnetic moment in units of Bohr magneton of a ferrous ion in any ferrite is

a.

zero

b.

2

c.

4

d.

6

Discuss
Answer: (c).4
Q102.
Assertion (A): The optical dielectric constant (i.e., ฮตr at optical frequencies)of ionic dielectrics is less than static dielectric constant.

Reason (R): At optical frequencies, Pi = 0.

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
Q103.
A piece of iron is placed in a magnetic field

a.

the magnetic field will not be affected

b.

the magnetic lines of force will bend to pass through the piece

c.

the magnetic lines of force will bend away from the piece

d.

any of the above depending on type of iron

Discuss
Answer: (b).the magnetic lines of force will bend to pass through the piece
Q104.
Assertion (A): Magnetism can be explained by the theory of magnetic domains.

Reason (R): The existence of magnetic domains is evident from the Bitter powder patterns.

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.
Ferromagnetic materials

a.

shows spontaneous magnetisation below a certain temperature

b.

have resistivity very high as compared to that of iron

c.

can be used even at microwave frequencies

d.

all of the above

Discuss
Answer: (d).all of the above
Q106.
In a specimen of ferromagnetic material, as the flux density is increased from zero to 2.5 T, µแตฃ will

a.

increase

b.

decrease

c.

first decrease then increase

d.

first increase then decrease

Discuss
Answer: (d).first increase then decrease
Q107.
In molecules of ionic crystals, orientation polarization is zero.

a.

True

b.

False

c.

May be True or False

d.

Can't say

Discuss
Answer: (a).True
Q108.
Assertion (A): COโ‚‚ has no resultant dipole moment but CO has a dipole moment.
Reason (R): The structure of COโ‚‚ 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
Q109.
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
Q110.
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
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