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 74 of 120

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Q731.
In SSB generation, the most commonly used filter is

a.

low pass

b.

RC

c.

LC

d.

mechanical

Discuss
Answer: (d).mechanical
Q732.
The FM broadcast band is from

a.

550 to 1600 kHz

b.

88 to 108 kHz

c.

88 to 108 MHz

d.

1600 kHz to 59.75 MHz

Discuss
Answer: (c).88 to 108 MHz
Q733.
If k is Boltzmann's constant, Tโ‚€ is standard ambient temperature, ฮดf is bandwidth of receiver, F is noise figure, the minimum receivable signal in a radar receiver is given by

a.

k Tโ‚€(ฮดf)(F)

b.

k Tโ‚€(ฮดf)(F - 1)

c.

k Tโ‚€(ฮดf) / (F - 1)

d.

none of the above

Discuss
Answer: (b).k Tโ‚€(ฮดf)(F - 1)
Q734.
The purpose of source coding is to

a.

increase the information transmission rate

b.

decrease S/N ratio

c.

decrease the information transmission rate

d.

decrease probability of error

Discuss
Answer: (b).decrease S/N ratio
Q735.
If a source of information generates messages at the rate of r messages per second and H is entropy, the information rate is

a.

H/r

b.

1/rH

c.

rH

d.

r/H

Discuss
Answer: (c).rH
Q736.
Consider the following statements about advantages of phase discriminator over slope detector

1. Fewer tuned circuits
2. Greater limiting
3. Better linearity
4. Easy alignment

Which of the above are true?

a.

1, 2, 3, 4

b.

2, 3, 4

c.

1, 2, 3

d.

1, 3, 4

Discuss
Answer: (d).1, 3, 4
Q737.
In a superheterodyne radio receiver

a.

RF amplifier normally operates at 455 kHz above carrier frequency

b.

mixer input must be tuned to the signal frequency

c.

local oscillator operates below signal frequency

d.

local oscillator frequency is double the IF

Discuss
Answer: (b).mixer input must be tuned to the signal frequency
Q738.
The assigned carrier frequency of an FM broadcast station is 96.3 MHz. Its FM signal has a centre frequency of

a.

10 MHz

b.

455 kHz

c.

48.15 MHz

d.

96.3 MHz

Discuss
Answer: (d).96.3 MHz
Q739.
Digital television is also called

a.

High digital television

b.

High definition television

c.

High deflection television

d.

High display television

Discuss
Answer: (b).High definition television
Q740.
The number of spectral component of a cosine wave is

a.

1

b.

0

c.

2

d.

4

Discuss
Answer: (c).2
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