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 21 of 120

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Q201.
In a colour TV receiver the bandwidth of RF amplifier is

a.

exactly equal to channel width

b.

a little less than channel width

c.

a little more than channel width

d.

either (a) or (b)

Discuss
Answer: (c).a little more than channel width
Q202.
An FM signal with a deviation is passes through the mixer, and has its frequency reduced five fold. The deviation in the output of the mixer is

a.

ฮ”

b.

5ฮ”

c.

ฮ”/5

d.

indeterminant

Discuss
Answer: (a).ฮ”
Q203.
Some advantages of optical fibre cables are

1. small diameter
2. Immunity to cross talk and EM interference
3. Laser and LED modulation methods lend themselves ideally to digital operation

Which of the above are correct?

a.

1 only

b.

1 and 2

c.

1, 2, 3

d.

2, 3

Discuss
Answer: (c).1, 2, 3
Q204.
The contrast control in colour TV receiver is done by

a.

chroma amplifier

b.

SAW filter

c.

video detector

d.

luminance amplifier

Discuss
Answer: (d).luminance amplifier
Q205.
The requirements of carrier frequency are

a.

precise frequency value

b.

low frequency drift

c.

both (a) and (b)

d.

neither (a) nor (b)

Discuss
Answer: (c).both (a) and (b)
Q206.
If N bits are lumped together to get an N-bit symbol, the possible number of symbols is

a.

2แดบ

b.

2แดบโ€พ¹

c.

2แดบโ€พ²

d.

2แดบโ€พโด

Discuss
Answer: (a).2แดบ
Q207.
The received signal frequency at any time of a super-heterodyne receiver having IF = 456 kHz is 1 MHz. The corresponding image signal is

a.

within the medium band

b.

outside the medium band

c.

depend upon modulation index

d.

depends on Modulating frequency

Discuss
Answer: (a).within the medium band
Q208.
A 300 Hz sound wave of intensity 20 dB is transmitted by a 1500 kHz radio wave by frequency modulation. It is seen that instantaneous frequency varies between 1500.2 kHz and 1499.8 kHz, 300 times a second. If the intensity of sound wave is 100 dB.

a.

The instantaneous frequency variations will be between 1500.2 and 1499.8 kHz, 1500 times a second

b.

The instantaneous frequency variations will be between 1501 and 1499 kHz, 1500 times a second

c.

The instantaneous frequency variations will be between 1501 and 1499 kHz, 300 times a second

d.

The instantaneous frequency variations will be between 1501 and 1499 kHz, 60 times a second

Discuss
Answer: (c).The instantaneous frequency variations will be between 1501 and 1499 kHz, 300 times a second
Q209.
If the average power of radar transmitters is 2 kW and the peak power of the transmitter is 1000 kW, what will be the duty cycle?

a.

0.002

b.

0.02

c.

0.001

d.

0.01

Discuss
Answer: (a).0.002
Q210.
An analog signal is band limited to B Hz sampled at Nyquist rate and samples are quantized into 4 levels each with probability 1/4. The information rate is

a.

4 bits/s

b.

B bits/s

c.

4 B bits/s

d.

0.25 B bits/s

Discuss
Answer: (c).4 B bits/s
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