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 1 of 120

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Q1.
If C is capacity of noisy channel, (bits/s), δf is bandwidth Hz and S/N is signal to noise ratio, then

a.

A

b.

B

c.

C

d.

D

Discuss
Answer: (a).A
Q2.
In the figure m(t) = 2 Sin2πt / t, s(t) = cos200πt, n(t) = sin199πt / t, the output y(t) will be

a.

A

b.

B

c.

C

d.

D

Discuss
Answer: (c).C
Q3.
In the following equation of M-ary PSK signal (where Ey is symbol energy), M becomes large. Then d will approach

a.

2

b.

infinity

c.

zero

d.

1

Discuss
Answer: (c).zero
Q4.
The trapezoidal pattern of figure is obtained when examining an AM wave by an oscilloscope. Modulation factor of the wave is

a.

0.33

b.

0.5

c.

2

d.

1

Discuss
Answer: (b).0.5
Q5.
If k is dielectric constant of a medium, the velocity factor in that medium is

a.

A

b.

B

c.

C

d.

D

Discuss
Answer: (b).B
Q6.
Fourier series expansion of a real periodic signal with fundamental frequency is given by following equation. It is given that c₃ = 3 + j5. then c-₃ is

a.

5 + j3

b.

-3 - j5

c.

-5 + j3

d.

3 - j5

Discuss
Answer: (d).3 - j5
Q7.
A signal m(t) with bandwidth 500 Hz is first multiplied by a signal g(t) where g(t) is given by below equation. The resulting signal is then passes through an ideal low pass filter with bandwidth 1 kHz the output of the low pass filter would be

a.

δ(t)

b.

m(t)

c.

0

d.

m(t) δ(t)

Discuss
Answer: (b).m(t)
Q8.
If a signal voltage Vs is accompanied by a noise voltage Vn the signal to noise ratio is

a.

A

b.

B

c.

C

d.

D

Discuss
Answer: (a).A
Q9.
A sequence x(n) with the z transform X(z) = z⁴ + z² - 2z + 2 - 3z - 4 is applied as an input to a linear, time invariant system with the impulse response h(n) = 2δ(n - 3) where δ(n) is given below. The output at n = 4 is

a.

- 6

b.

zero

c.

2

d.

- 4

Discuss
Answer: (b).zero
Q10.
In a satellite transponder the power amplifier feeds power P to the transmitting antenna of gain G. If distance of earth is d, the power flux density is

a.

A

b.

B

c.

C

d.

D

Discuss
Answer: (b).B
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