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 4 of 44

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Q31.
An electron is moving around a proton, in a circle of radius R. If flux density in the region is increased from zero to B, the force on the electron is

a.

A

b.

B

c.

C

d.

D

Discuss
Answer: (a).A
Q32.
If ฮผp is permanent dipole moment and T is absolute temperature, the orientation polarization of polyatomic gases is

a.

A

b.

B

c.

C

d.

D

Discuss
Answer: (b).B
Q33.
Assertion (A): At a temperature of 1000 K, thermionic emission current is about 0.1 A/cm² of surface.Reason (R): Thermionic emission current is given by Ith = SAโ‚€ T² e^(-Ew/kT).

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
Q34.
At room temperature, the current in intrinsic semiconductor is due to

a.

holes

b.

electrons

c.

ions

d.

holes and electrons

Discuss
Answer: (d).holes and electrons
Q35.
Ferroelectric materials are those which

a.

cannot be polarized

b.

have a permanent polarization

c.

have ae equal to zero

d.

have ฮผp = 0

Discuss
Answer: (b).have a permanent polarization
Q36.
Assertion (A): Power loss in a conductor of resistance P = I²R.
Reason (R): When a conductor is carrying current with current density J as a result of applied field E, then heat developed/m³/ second = JE.

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
Q37.
Assertion (A): For Diamond, ฮผแตฃ = 1
Reason (R): Diamond is a diamagnetic material.

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
Q38.
For a paramagnetic material, susceptiblity increases with increasing temperature.

a.

True

b.

False

c.

May be True or False

d.

Can't say

Discuss
Answer: (b).False
Q39.
Hydrogen is used in

a.

large size transformers

b.

MCB

c.

large size generators

d.

circuit breakers

Discuss
Answer: (c).large size generators
Q40.
Assertion (A): Ferroelectric materials have spontaneous polarization.
Reason (R): Above curie temperature, โˆˆ = C/(T-ฯด) for ferro-electric materials.

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
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