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 112 of 120

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Q1111.
Y signal has maximum percentage of

a.

red colour

b.

blue colour

c.

green colour

d.

red and blue colours

Discuss
Answer: (c).green colour
Q1112.
To ensure good transient response in audio systems the natural frequencies should be

a.

above 40 Hz and below 15 kHz

b.

above 40 Hz

c.

above 15 kHz

d.

below 40 Hz and above 15 kHz

Discuss
Answer: (c).above 15 kHz
Q1113.
Consider the following features of monochrome TV

1. Number of lines per picture - 625
2. Interlace ratio - 2 : 1
3. Aspect ratio - 4 : 3
4. Channel bandwidth - 8 MHz

As regards CCIR system B, which of the above are correct?

a.

1, 2, 3, 4

b.

1, 2, 3

c.

1, 2, 4

d.

2, 3, 4

Discuss
Answer: (b).1, 2, 3
Q1114.
In the absence of noise, if C is channel capacity in bits/s, ฮดf is channel bandwidth in Hz and N is number of coding levels. Then

a.

C = logโ‚‚ N

b.

C = (ฮดf) logโ‚‚ N

c.

C = 2 (ฮดf) logโ‚‚ N

d.

C = 0.5 (ฮดf) logโ‚‚ N

Discuss
Answer: (c).C = 2 (ฮดf) logโ‚‚ N
Q1115.
The open loop gain of an amplifier is 50 but is likely to change by 20%. If negative feedback with ฮฒ = 0.1 is used, the change in gain will be about

a.

20%

b.

10%

c.

4%

d.

0.05%

Discuss
Answer: (c).4%
Q1116.
Audio amplifiers need

a.

Bass control

b.

Treble control

c.

Both Bass and Treble control

d.

Either Bass or Treble control

Discuss
Answer: (c).Both Bass and Treble control
Q1117.
For an ideal 3000 Hz channel, S/N ratio is

a.

3

b.

1.5

c.

4

d.

2

Discuss
Answer: (a).3
Q1118.
Which of the following types of noise assumes greater importance at high frequencies?

a.

Transit time noise

b.

Shot noise

c.

Impulse noise

d.

Random noise

Discuss
Answer: (a).Transit time noise
Q1119.
In transistor radio receivers the number of IF amplifier stages are

a.

1

b.

2

c.

4

d.

6

Discuss
Answer: (b).2
Q1120.
To relay outdoor remotely located live programs, TV transmitter use

a.

microwave links

b.

coaxial cable link

c.

open wire link

d.

either (b) or (c)

Discuss
Answer: (a).microwave links
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