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 15 of 120

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Q141.
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%
Q142.
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
Q143.
For an ideal 3000 Hz channel, S/N ratio is

a.

3

b.

1.5

c.

4

d.

2

Discuss
Answer: (a).3
Q144.
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
Q145.
In transistor radio receivers the number of IF amplifier stages are

a.

1

b.

2

c.

4

d.

6

Discuss
Answer: (b).2
Q146.
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
Q147.
An amplifier has an input resistance of 10 kฮฉ and the noise voltage is 10 ฮผV. If two such resistances of 10 kฮฉ each are connected in series at the input, the total noise voltage is about

a.

20 ฮผV

b.

5ฮผV

c.

14.14 ฮผV

d.

10 ฮผV

Discuss
Answer: (c).14.14 ฮผV
Q148.
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
Q149.
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”
Q150.
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
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