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 17 of 120

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Q161.
Consider the draw backs

1. Slope overload
2. Serration noise
3. Granular noise

Which of these draw backs does Delta modulation have?

a.

1 and 2 only

b.

2 and 3 only

c.

1 and 3 only

d.

1, 2, 3

Discuss
Answer: (c).1 and 3 only
Q162.
It is required to increase the maximum range of a radar by a factor of two. The peak power transmitted in the radar system has to be increased by a factor of

a.

2

b.

4

c.

8

d.

16

Discuss
Answer: (a).2
Q163.
Armstrong F.M. transmitter performs frequency multiplication in stages

a.

to increase the overall S/N

b.

for convenience

c.

to reduce the bandwidth

d.

to find the desired value of carrier frequency with frequency deviation

Discuss
Answer: (d).to find the desired value of carrier frequency with frequency deviation
Q164.
A source generates three symbols with probabilities 0.25, 0.25, 0.50 at a rate of 3000 symbols per second. Assuming independent generation of symbols, the most efficient source encoder would have average bit rate is as

a.

6000 bits/sec

b.

4500 bits/sec

c.

3000 bits/sec

d.

1500 bits/sec

Discuss
Answer: (b).4500 bits/sec
Q165.
The colour subcarrier and sidebands produced by its modulation with the chrominance signals are accommodated in the standard channel width by the process of

a.

frequency adjustment

b.

frequency interleaving

c.

frequency changing

d.

frequency amalgamation

Discuss
Answer: (b).frequency interleaving
Q166.
In FM signal with a modulation index mf is passed through a frequency tripler. The wave in the output of the tripler will have a modulation index of

a.

mf

b.

3mf

c.

mf/3

d.

mf/9

Discuss
Answer: (b).3mf
Q167.
In colour TV receiver, varactor diode is used for

a.

detection

b.

rectification

c.

tuning

d.

both (a) and (b)

Discuss
Answer: (c).tuning
Q168.
The number of noise sources in a BJT are

a.

3

b.

2

c.

1

d.

4

Discuss
Answer: (a).3
Q169.
Energy content of atmospheric noise

a.

does not depend on frequency

b.

decreases as frequency is increased

c.

increases as frequency is increased

d.

either (a) or (c) depending on the temperature

Discuss
Answer: (b).decreases as frequency is increased
Q170.
As the frequency increases, the absorption of ground wave by earth's surface

a.

decreases

b.

increases

c.

remains the same

d.

either (a) or (c)

Discuss
Answer: (b).increases
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