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 2 of 44

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Q11.
A material has N spins per m³. If Np are the dipoles per m³ parallel to field and Na are the dipoles per m³ anti-parallel to field, the magnetisation is

a.

A

b.

B

c.

C

d.

D

Discuss
Answer: (a).A
Q12.
An electron is moving in a circular orbit of radius R at angular velocity ฯ‰โ‚€ in a field free space. If a magnetic field B is created, the velocity of electron ฯ‰ will be given by the equation

a.

A

b.

B

c.

C

d.

D

Discuss
Answer: (a).A
Q13.
From a homogeneous and isotropic dielectric material of dielectric constant โˆˆr, a small volume element is taken out creating a cavity. The field can be kept homogeneous if Di. (i.e., electric flux density inside the cavity) and D0 (i.e., electric flux density outside the cavity) are such that

a.

A

b.

B

c.

C

d.

D

Discuss
Answer: (b).B
Q14.
Figure shows a composite capacitor. If CA, CB, CC are the capacitances of capacitors A, B, C, the overall capacitance C is

a.

A

b.

B

c.

C

d.

D

Discuss
Answer: (c).C
Q15.
Consider the following statements:

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
Q16.
A parallel plate capacitor has area of plate A and plate separation d. Its capacitance is C. A metallic plate P of area A and negligible thickness is added as shown in Figure. The new value of capacitance is

a.

C

b.

2C

c.

0.5 C

d.

0.25 C

Discuss
Answer: (a).C
Q17.
If a metal specimen has n valence electrons per m³ each having charge e and mass m and t is the relaxations time, the conductivity is

a.

A

b.

B

c.

C

d.

D

Discuss
Answer: (b).B
Q18.
As per Matthiessen's rule, the total resistivity r of a conductor can be written as ฯ = ฯi + aT, where ฯi and a are constants and T is absolute temperature. At very low temperatures

a.

aT = 0

b.

aT > ฯi

c.

aT โˆผ ฯi

d.

aT < ฯi

Discuss
Answer: (d).aT < ฯi
Q19.
An electron in a metal suffers collision and if the probability of it being scattered over an angle dฮธ is 2ฯ€ P(ฮธ) sin ฮธ dฮธ where P(ฮธ) is an arbitrary function of scattering angle ฮธ, then

a.

A

b.

B

c.

C

d.

D

Discuss
Answer: (c).C
Q20.
If v is velocity of electron, ฮต0 is absolute permittivity, m is mass of electron, e is charge on electron and r is the radius of orbit of electron in hydrogen atom, the stability of orbit requires the following equation to be satisfied

a.

A

b.

B

c.

C

d.

D

Discuss
Answer: (b).B
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