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 38 of 44

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Q371.
In an intrinsic semiconductor, at a given temperature T

a.

the number of electrons-hole pairs generated per second due to thermal motion are equal to the number of electron-hole pairs lost per second due to recombination

b.

the number of electron-hole pairs generated per second due to thermal motion is always less than the number of electron-hole pairs lost per second due to recombination

c.

the number of electron hole pairs generated per second due to thermal motion is always more than the number of electron-hole pairs lost per second due to recombination

d.

any of the above

Discuss
Answer: (a).the number of electrons-hole pairs generated per second due to thermal motion are equal to the number of electron-hole pairs lost per second due to recombination
Q372.
The core of a solenoid is made of material of relative permeability ฮผแตฃ. A small cavity area dA and length dl is cut in the core. If it is desired that flux density in the cavity should be equal to B0

a.

the fields inside and outside the cavity must be equal

b.

the field inside the cavity must be made stronger than field outside the cavity

c.

the field inside the cavity must be made weaker than the field outside the cavity

d.

none of the above

Discuss
Answer: (b).the field inside the cavity must be made stronger than field outside the cavity
Q373.
A copper specimen has resistivity equal to 1.8 x 10¯โธ ohm-m at room temperature. At a temperature of 700 K, the resistivity is likely to be

a.

1.6 x 10¯โธ ฮฉ-m

b.

2 x 10¯โธ ฮฉ-m

c.

3 x 10¯โธ ฮฉ-m

d.

6 x 10¯โธ ฮฉ-m

Discuss
Answer: (d).6 x 10¯โธ ฮฉ-m
Q374.
Assertion (A): Dielectric constant is independent of temperature unless the temperature is extremely high.

Reason (R): For normal temperatures the number of atoms per unit volume is constant.

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
Q375.
As the atoms of rare gases become larger, electronic polarizability

a.

increases

b.

decreases

c.

remains the same

d.

may increase or decrease

Discuss
Answer: (c).remains the same
Q376.
Ferrimagnetic materials have anti-parallel orientation of equal moments of permanent dipoles.

a.

True

b.

False

c.

May be True or False

d.

Can't say

Discuss
Answer: (a).True
Q377.
Carbon steel has a residual flux density of 1 Wb/m².

a.

True

b.

False

c.

May be True or False

d.

Can't say

Discuss
Answer: (a).True
Q378.
When an atom of polarizability a is placed in an electric field E, the energy stored in atom is 0.5 ฮฑ E².

a.

True

b.

False

c.

May be True or False

d.

Can't say

Discuss
Answer: (a).True
Q379.
The charge per proton is

a.

1.6 x 10¯¹โน C

b.

2.6 x 10¯¹โน C

c.

0.6 x 10¯¹โน C

d.

1.6 x 10¯¹³ C

Discuss
Answer: (a).1.6 x 10¯¹โน C
Q380.
In terms of Planck's constant h, the orbital angular momentum of an electron is

a.

h

b.

h/2ฯ€

c.

2ฯ€h

d.

h/ฯ€

Discuss
Answer: (b).h/2ฯ€
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