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 93 of 120

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Q921.
Non-coherently detection is not possible for

a.

PSK

b.

ASK

c.

FSK

d.

both (a) and (c)

Discuss
Answer: (a).PSK
Q922.
Tracking of extra terrestrial objects requires

a.

high transmitting power

b.

very sensitive receiver

c.

fully steerable antenna

d.

all of the above

Discuss
Answer: (d).all of the above
Q923.
Assertion (A): Free space does not interfere with normal radiation and propagation of radio waves

Reason (R): Free space has no magnetic or gravitational fields.

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: (a).Both A and R are correct and R is correct explanation of A
Q924.
Which of the following is taken as reference antenna for directive gain?

a.

Half wave dipole

b.

Elementary doublet

c.

Isotropic

d.

Infinitesimal dipole

Discuss
Answer: (c).Isotropic
Q925.
Push pull amplifier is

a.

voltage amplifier

b.

current amplifier

c.

power amplifier

d.

none of the above

Discuss
Answer: (c).power amplifier
Q926.
When the channel is noisy, producing a conditional probability of error p = 0.5; the channel capacity and entropy function would be, respectively,

a.

1 and 1

b.

1 and 0.5

c.

0.5 and 1

d.

0 and 1

Discuss
Answer: (d).0 and 1
Q927.
In CCIR-B system, the time between start of one H syn. pulse and next is

a.

64 ฮผs

b.

6.4 ฮผs

c.

640 ฮผs

d.

0.64 ฮผs

Discuss
Answer: (a).64 ฮผs
Q928.
Counterpoise is used in coils having

a.

high resistivity

b.

low resistivity

c.

medium resistivity

d.

both (b) and (c)

Discuss
Answer: (a).high resistivity
Q929.
In standing wave pattern on a transmission line

a.

voltage and current nodes coincide

b.

voltage and current antinodes coincide

c.

voltage nodes and current antinodes as well as current nodes and voltage antinodes coincide

d.

both (a) and (b)

Discuss
Answer: (c).voltage nodes and current antinodes as well as current nodes and voltage antinodes coincide
Q930.
If the bandwidth is increased by 2, the ฮณFM ฮณAM (where ฮณ is the ratio of SNR of output to SNR at input, FM is frequency modulation and AM is amplitude modulation) is increased by a factor of

a.

2

b.

3

c.

4

d.

6

Discuss
Answer: (c).4
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