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 18 of 44

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Q171.
The capacitance of an insulated conducting sphere of radius R in vacuum is

a.

2ฯ€โˆˆโ‚€R

b.

4ฯ€โˆˆโ‚€R

c.

4ฯ€โˆˆโ‚€R²

d.

4ฯ€โˆˆโ‚€/R

Discuss
Answer: (b).4ฯ€โˆˆโ‚€R
Q172.
The transition of electron from energy level W1 to W2 is associated with emission or absorption of electro magnetic radiation of frequency f such that

a.

hf = |W1 - W2|

b.

|W1 - W2|f = h

c.

hf = 0.5|W1 - W2|

d.

(hf)² = |W1 - W2|

Discuss
Answer: (a).hf = |W1 - W2|
Q173.
Even at room temperature, an intrinsic semiconductor has some holes. These holes are due to

a.

electron

b.

doping

c.

thermal energy

d.

free electrons

Discuss
Answer: (c).thermal energy
Q174.
If a capacitor C having selectivity factor Q is scaled down in all its dimensions by a factor K without any altering the dielectric material, the new capacitor will have capacitance and selectivity as

a.

C,Q/K

b.

C/K, Q

c.

C/K, Q/K

d.

C, K

Discuss
Answer: (b).C/K, Q
Q175.
The hysteresis loss is

a.

proportional to frequency

b.

independent of frequency

c.

proportional to (frequency)²

d.

proportional to 1/frequency

Discuss
Answer: (a).proportional to frequency
Q176.
Assertion (A): For a magnetic material M = (ฮผแตฃ - 1) H, where M is magnetic dipole moment/m³, H is field intensity A/m and ฮผแตฃ is relative permeability.

Reason (R): ฮผแตฃ can have any value from 0 to hundreds of thousands.

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: (c).A is true but R is false
Q177.
As regards โˆˆโ‚€ and โˆˆแตฃ (absolute and relative permittivity)

a.

both โˆˆโ‚€ and โˆˆแตฃ can be interpreted in terms of atomic properties of medium

b.

only โˆˆแตฃ can be interpreted in terms of atomic properties of medium

c.

only โˆˆโ‚€ can be interpreted in terms of atomic properties

d.

โˆˆแตฃ has no physical significance

Discuss
Answer: (b).only โˆˆแตฃ can be interpreted in terms of atomic properties of medium
Q178.
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
Q179.
In a metal, the drift velocity of electrons in the presence of a electric field E is

a.

proportional to E

b.

proportional to โˆšE

c.

inversely proportional to E

d.

proportional to E²

Discuss
Answer: (a).proportional to E
Q180.
At a temperature of about 1 K, aluminium is a

a.

conductor

b.

insulator

c.

photoconductor

d.

superconductor

Discuss
Answer: (d).superconductor
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