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 3 of 120

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Q21.
A single tone modulating signal Vm cos ฯ‰t modulates a carrier A cos ฯ‰ct. The carrier power (modulated) and side band powers are respectively

a.

A

b.

B

c.

C

d.

D

Discuss
Answer: (a).A
Q22.
Modulation index of a AM wave is measured using oscilloscope. The display on the CRO is as shown in figure it can be concluded that

a.

the output wave is distorted

b.

the output wave is under modulated

c.

the modulation index is 100%

d.

the modulation index is 50%

Discuss
Answer: (a).the output wave is distorted
Q23.
If f is frequency and d is distance, path attenuation a between isotropic antennas is given by

a.

A

b.

B

c.

C

d.

D

Discuss
Answer: (a).A
Q24.
If the transmitted pulse power of a radar is Pt (peak value) and the antenna is isotropic, the power density at a distance r is

a.

A

b.

B

c.

C

d.

D

Discuss
Answer: (b).B
Q25.
In delta modulation, the output signal to quantization noise ratio S0/Nq is (N is the number of bits)

a.

A

b.

B

c.

C

d.

D

Discuss
Answer: (b).B
Q26.
Which of the following operation are performed on linear queues?

1. Testing a linear queue for underflow
2. Enqueue operation
3. Dequeue operation
4. Testing a linear queue for overflow

Select the correct answer using the codes given below the lists

a.

1, 2 and 3

b.

2, 3 and 4

c.

1, 3 and 4

d.

1, 2, 3 and 4

Discuss
Answer: (d).1, 2, 3 and 4
Q27.
The colour subcarrier and sidebands produced by its modulation with the chrominance signals are accommodated in the standard channel width by the process of

a.

frequency adjustment

b.

frequency interleaving

c.

frequency changing

d.

frequency amalgamation

Discuss
Answer: (b).frequency interleaving
Q28.
In FM signal with a modulation index mf is passed through a frequency tripler. The wave in the output of the tripler will have a modulation index of

a.

mf

b.

3mf

c.

mf/3

d.

mf/9

Discuss
Answer: (b).3mf
Q29.
In colour TV receiver, varactor diode is used for

a.

detection

b.

rectification

c.

tuning

d.

both (a) and (b)

Discuss
Answer: (c).tuning
Q30.
The number of noise sources in a BJT are

a.

3

b.

2

c.

1

d.

4

Discuss
Answer: (a).3
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