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 31 of 120

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Q301.
Consider the draw backs

1. Slope overload
2. Serration noise
3. Granular noise

Which of these draw backs does Delta modulation have?

a.

1 and 2 only

b.

2 and 3 only

c.

1 and 3 only

d.

1, 2, 3

Discuss
Answer: (c).1 and 3 only
Q302.
It is required to increase the maximum range of a radar by a factor of two. The peak power transmitted in the radar system has to be increased by a factor of

a.

2

b.

4

c.

8

d.

16

Discuss
Answer: (a).2
Q303.
Armstrong F.M. transmitter performs frequency multiplication in stages

a.

to increase the overall S/N

b.

for convenience

c.

to reduce the bandwidth

d.

to find the desired value of carrier frequency with frequency deviation

Discuss
Answer: (d).to find the desired value of carrier frequency with frequency deviation
Q304.
A source generates three symbols with probabilities 0.25, 0.25, 0.50 at a rate of 3000 symbols per second. Assuming independent generation of symbols, the most efficient source encoder would have average bit rate is as

a.

6000 bits/sec

b.

4500 bits/sec

c.

3000 bits/sec

d.

1500 bits/sec

Discuss
Answer: (b).4500 bits/sec
Q305.
The filter circuit for feeding tweeter has

a.

an inductance in series and a capacitance in parallel

b.

a capacitance in series and an inductance in parallel

c.

a resistance in series and a capacitance in parallel

d.

a capacitance in series and a resistance in parallel

Discuss
Answer: (b).a capacitance in series and an inductance in parallel
Q306.
A narrow band noise n(t) has symmetrical spectrum and has power density spectrum 0.2 x 10‾⁶. The power density of quadrature component is

a.

0.2 x 10‾⁶

b.

10‾⁷

c.

4 x 10‾⁷

d.

5 x 10‾⁸

Discuss
Answer: (b).10‾⁷
Q307.
The radio receivers mostly used now a days are

a.

TRF receivers

b.

super heterodyne receivers

c.

CW receivers

d.

pulsed receivers

Discuss
Answer: (b).super heterodyne receivers
Q308.
The reactance of coupling capacitors, for DC quantities, is

a.

zero

b.

low

c.

infinite

d.

zero or low

Discuss
Answer: (c).infinite
Q309.
An AM wave is given by s(t)AM = 20 (1 + 0.5 cos 10³t + 0.3 cos 10⁴ t cos 10⁶ t) the modulation index of the envelope is

a.

0.5

b.

0.58

c.

0.3

d.

0.8

Discuss
Answer: (b).0.58
Q310.
The modulating frequency in frequency modulation is increased from 10 kHz to 30 kHz. The bandwidth is increased by

a.

6

b.

1/6 times

c.

increase by 30 kHz

d.

increase by 20 kHz

Discuss
Answer: (a).6
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