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 17 of 44

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Q161.
In carbon resistor colour code, if the third band is of silver, it indicates

a.

that three zeros are to be added to indicate the resistance value

b.

multiplier is 0.01

c.

multiplier is 0.1

d.

tolerance is ± 5%

Discuss
Answer: (b).multiplier is 0.01
Q162.
In a metal, the drift velocity of electrons in the presence of a electric field E is

a.

proportional to E

b.

proportional to √E

c.

inversely proportional to E

d.

proportional to E²

Discuss
Answer: (a).proportional to E
Q163.
At a temperature of about 1 K, aluminium is a

a.

conductor

b.

insulator

c.

photoconductor

d.

superconductor

Discuss
Answer: (d).superconductor
Q164.
If v is the velocity of electron, tc is the average time between collisions, the mean free path λ = vtc.

a.

True

b.

False

c.

May be True or False

d.

Can't say

Discuss
Answer: (a).True
Q165.
A liquid has N permanent dipoles μᵨ per unit volume and has been subjected to dc field for a long time such that orientation polarization is P₀. At t = 0, the field is suddenly removed, then polarization

a.

will remain constant at P₀

b.

will become zero at t = 0

c.

will delay to zero with a time constant

d.

either b or c

Discuss
Answer: (c).will delay to zero with a time constant
Q166.
Assertion (A): Orbital magnetic moment of an electron in an atom is of the order of 1 Bohr magneton.

Reason (R): 1 Bohr magneton = 9.27 x 10^-24 A/m².

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
Q167.
As per Bohr's postulate, only those circular orbits are stable for which the angular momentum is equal to an integer times h/2π .

a.

True

b.

False

c.

May be True or False

d.

Can't say

Discuss
Answer: (a).True
Q168.
Inductors used at V.H.F. are made using

a.

air core

b.

cast iron cored

c.

sheet steel cored

d.

thin film technique

Discuss
Answer: (d).thin film technique
Q169.
The resistivity of intrinsic semiconductors, at room temperature, is of the order of

a.

1 Ω-m

b.

1000 Ω-m

c.

10⁶ Ω-m

d.

10¯³ Ω-m

Discuss
Answer: (a).1 Ω-m
Q170.
In terms of classical representation of electrons

a.

an atom is essentially empty

b.

an atom is essentially full

c.

an atom may be essentially empty or full depending on the material

d.

an atom may be essentially empty or full depending on temperature

Discuss
Answer: (a).an atom is essentially empty
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