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 27 of 44

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Q261.
Assertion (A): For a dielectric, P = โˆˆโ‚€(โˆˆแตฃ - 1) E.

Reason (R): Dipole moment per unit volume is called polarization of dielectric.

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
Q262.
Assertion (A): Ferrites are very useful at very high frequencies.

Reason (R): Ferrites have high permeability and high resistivity.

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
Q263.
In a conductor the current flow is due to

a.

holes

b.

electrons

c.

ions

d.

electrons and ions

Discuss
Answer: (b).electrons
Q264.
When an electron moves at velocity v in combined electric and magnetic fields E and H, the Lorentz force F is F = - e(E + v x B).

a.

True

b.

False

c.

May be True or False

d.

Can't say

Discuss
Answer: (a).True
Q265.
When Schrodinger equation is applied to the motion of electron in the field of protons, the physically acceptable solutions for the wave function exist for quantum number which are

a.

2

b.

3

c.

4

d.

5

Discuss
Answer: (b).3
Q266.
For dielectrics in alternating field, polarizability ฮฑe is a complex quantity. The imaginary part of ae is zero for

a.

ฯ‰ = 0

b.

ฯ‰ โ†’ โˆž

c.

ฯ‰ = 0 and ฯ‰ โ†’ โˆž

d.

ฯ‰ = natural frequency ฯ‰โ‚€

Discuss
Answer: (c).ฯ‰ = 0 and ฯ‰ โ†’ โˆž
Q267.
In the wave mechanical theory, the maximum of the charge distribution in the ground state occurs for a distance from the nucleus equal to

a.

first Bohr radius

b.

second Bohr radius

c.

third Bohr radius

d.

either first or second Bohr radius

Discuss
Answer: (a).first Bohr radius
Q268.
The induced magnetic dipole moment has a direction opposite to the applied magnetic field.

a.

True

b.

False

c.

May be True or False

d.

Can't say

Discuss
Answer: (a).True
Q269.
An atom of polarizability a is placed in a homogeneous electric field E. The energy stored in polarized atom is

a.

ฮฑE²

b.

ฮฑ²E

c.

ฮฑE²/2

d.

ฮฑE/2

Discuss
Answer: (c).ฮฑE²/2
Q270.
If B, H and M denote flux density, field intensity and magnetisation, B = ฮผโ‚€ (H + M).

a.

True

b.

False

c.

May be True or False

d.

Can't say

Discuss
Answer: (a).True
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