Communication Systems MCQs

Welcome to our comprehensive collection of Multiple Choice Questions (MCQs) on Communication Systems, 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 Communication Systems 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 Communication Systems mcq questions that explore various aspects of Communication Systems problems. Each MCQ is crafted to challenge your understanding of Communication Systems 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 Communication Systems 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 Communication Systems. 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 Communication Systems knowledge to the test? Let's get started with our carefully curated MCQs!

Communication Systems MCQs | Page 41 of 120

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Q401.
The PSD and the power of a signal g(t) are respectively Sg(ฯ‰) and Pg, the PSD and the power of signal a.g(t) are respectively

a.

aS²g (ฯ‰) and a²Pg

b.

aSg² (ฯ‰) and aPg

c.

aSg (ฯ‰) and a²Pg

d.

aSg (ฯ‰) and aPg

Discuss
Answer: (a).aS²g (ฯ‰) and a²Pg
Q402.
The simplest method of suppression of unwanted side band in AM is

a.

filter method

b.

phase shift method

c.

third method

d.

both (a) and (b)

Discuss
Answer: (a).filter method
Q403.
For attenuation of low frequencies we should use

a.

shunt capacitance

b.

series capacitance

c.

shunt inductance

d.

series inductance

Discuss
Answer: (b).series capacitance
Q404.
Assertion (A): A colour TV uses a SAW filter to give stable band pass response and high gain.

Reason (R): Devices using SAW principle are used in many systems.

a.

Both A and R are correct and R is correct explanation of A

b.

Both A and R are correct but R is not correct explanation of A

c.

A is correct but R is wrong

d.

A is wrong but R is correct

Discuss
Answer: (b).Both A and R are correct but R is not correct explanation of A
Q405.
In an FM signal, the modulating frequency is 2 kHz and maximum deviation is 10 kHz. The bandwidth requirement is

a.

2 kHz

b.

10 kHz

c.

5 kHz

d.

32 kHz

Discuss
Answer: (b).10 kHz
Q406.
The effective length of antenna is different from actual length due to

a.

top loading

b.

end effects

c.

both (a) and (b)

d.

none of the above

Discuss
Answer: (c).both (a) and (b)
Q407.
In a TV receiver there is no raster, no picture and no sound. The most likely defective stage is

a.

power supply unit

b.

video output circuit

c.

horizontal oscillator

d.

balun

Discuss
Answer: (a).power supply unit
Q408.
Noise can be measured by

a.

D.C. voltmeter

b.

A.C. voltmeter

c.

either of the above

d.

none of the above

Discuss
Answer: (b).A.C. voltmeter
Q409.
A 100 + j 100 ฮฉ load is to be matched to a line with Z0 = 300 ฮฉ to give SWR = 1. The reactance of stub is

a.

j 200 ฮฉ

b.

-j 200 ฮฉ

c.

j 100 ฮฉ

d.

-j 100 ฮฉ

Discuss
Answer: (b).-j 200 ฮฉ
Q410.
In VHS format each video head is tilted from azimuth by

a.

20°

b.

10°

c.

6°

d.

1°

Discuss
Answer: (c).6°
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