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 42 of 44

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Q411.
Hall effect is observed in a specimen (metal or semi- conductor) when it is carrying current and is placed in a magnetic field. The resultant electric field inside the specimen is

a.

normal to both current and magnetic field

b.

in the same direction as current

c.

in a direction anti parallel to magnetic field

d.

none of the above

Discuss
Answer: (a).normal to both current and magnetic field
Q412.
The capacitance of a capacitor is not affected by

a.

area of plates

b.

thickness of plates

c.

โˆˆแตฃ

d.

distance between plates

Discuss
Answer: (b).thickness of plates
Q413.
The unit for mmf is

a.

A

b.

Wb

c.

T

d.

V

Discuss
Answer: (a).A
Q414.
A magnetic field exists around

a.

moving charges

b.

static charges

c.

iron

d.

copper

Discuss
Answer: (a).moving charges
Q415.
A conductor carries 10 A current in + x direction and is lying in a field having a flux density 0.2 T directed along + z direction. The magnitude of force per metre length and direction are

a.

2 N, + y direction

b.

2 N, - y direction

c.

0.02 N, + y direction

d.

0.02 N, - y direction

Discuss
Answer: (b).2 N, - y direction
Q416.
The residual resistivity of a binary alloy at 0 K is

a.

sum of residual resistivities of component metals

b.

difference of residual resistivities of component metals

c.

product of residual resistivities of component metals

d.

dependent on the concentration of minor component in the alloy

Discuss
Answer: (d).dependent on the concentration of minor component in the alloy
Q417.
The resistance of a photoconductor

a.

increases with increase in light intensity

b.

decreases with increase in light intensity

c.

may increase or decrease with increase in light intensity

d.

remains constant

Discuss
Answer: (b).decreases with increase in light intensity
Q418.
Assertion (A): Electron concentration n, hole concentration p and charge concentration ni are related by ni² = np.

Reason (R): p type semiconductor is obtained by adding trivalent impurity to intrinsic semiconductor.

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
Q419.
The temperature at which some materials become superconductors is called

a.

Transition temperature

b.

Curie temperature

c.

Neel temperature

d.

Onnes temperature

Discuss
Answer: (a).Transition temperature
Q420.
In Fermi-Dirac statistics, the probability of electron occupation of an energy level equal to Fermi level is

a.

0

b.

0.25

c.

0.5

d.

1

Discuss
Answer: (c).0.5
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