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 91 of 120

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Q901.
During transmission over a communication channel, bit errors occur independently with probability P. If a block of n bits is transmitted, the probability of at most one bit error is equal to

a.

1 - (1 - P)โฟ

b.

P + (n - 1) (1 - P)

c.

nP (1 - P)โฟโ€พ¹

d.

(1 - P)โฟ + nP (1 - P)โฟโ€พ¹

Discuss
Answer: (a).1 - (1 - P)โฟ
Q902.
Assertion (A): In AM carrier component remains constant in amplitude and frequency.

Reason (R): In AM the two side bands are images of each other.

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
Q903.
In tape recorders the hissing noise is due to irregularities in magnetic coating on tape.

a.

True

b.

False

c.

May be True or False

d.

Can't say

Discuss
Answer: (a).True
Q904.
The main advantage of TDM over FDM is

a.

TDM requires more bandwidth than FDM

b.

less complicated in hardware than FDM

c.

better SNR

d.

required filter

Discuss
Answer: (c).better SNR
Q905.
In FM reception, amplitude disturbances due to static change

a.

reduce the signal frequencies

b.

increase the signal frequencies

c.

disturb the signal frequencies

d.

do not affect the signal frequencies

Discuss
Answer: (d).do not affect the signal frequencies
Q906.
In a colour TV receiver, PAL Dematrix consists of

a.

chroma detector to separate the three primary colours

b.

delay line and PAL matrix to give U and V signals

c.

delay line and PAL matrix to give RGB colours

d.

none of the above

Discuss
Answer: (b).delay line and PAL matrix to give U and V signals
Q907.
For a resistance of about 15 kฮฉ operating in a frequency range of a few MHz, the noise voltage is in the range of

a.

a few ฮผV

b.

about 100 ฮผV

c.

a few ฮผV

d.

a few volts

Discuss
Answer: (c).a few ฮผV
Q908.
In a 50 cm TV tube, a path difference of 2 km between direct wave and interfering wave would mean a displacement between main image and ghost image equal to

a.

0.3 cm

b.

3 cm

c.

6 cm

d.

9 cm

Discuss
Answer: (a).0.3 cm
Q909.
In a colour TV receiver, the sound intercarrier IF is generated in

a.

video detector

b.

video IF amplifier

c.

tuner mixer stage

d.

limiter stage

Discuss
Answer: (a).video detector
Q910.
Consider the following types of distortions in diode detectors

1. Distortion is caused due to the reason that dc and ac load impedances are unequal
2. Distortion is caused because ac load impedance has a reactive component at high audio frequencies
3. Audio frequency diode current is less than dc current

Which of the above are true?

a.

1, 2 and 3

b.

1 and 2

c.

1 and 3

d.

2 and 3

Discuss
Answer: (b).1 and 2
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