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 35 of 120

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Q341.
Convolution of x(t + 5) with impulse function ฮด(t - 7) is equal to

a.

x(t - 2)

b.

x(t + 12)

c.

x(t - 12)

d.

(t + 2)

Discuss
Answer: (a).x(t - 2)
Q342.
Which of the following is a better recording medium?

a.

Ferric oxide

b.

Ferrous oxide

c.

Chromium di oxide

d.

Either (a) or (b)

Discuss
Answer: (c).Chromium di oxide
Q343.
An angle modulated signal is given by s(t) = cos 2ฯ€ (2 x 10โถt + 30 sin 150t + 40 cos 150t). The maximum frequency and phase deviations of s(t) are

a.

10.5 kHz, 140ฯ€ rad

b.

6 kHz and 80ฯ€ rad

c.

10.5 kHz, 100ฯ€ rad

d.

7.5 kHz, 100ฯ€ rad

Discuss
Answer: (d).7.5 kHz, 100ฯ€ rad
Q344.
Microwave link repeaters are typically 50 km apart in TV transmission due to

a.

atmosphere attenuation

b.

output power tube limitations

c.

attenuation of surface wave

d.

earth's curvature

Discuss
Answer: (d).earth's curvature
Q345.
Assertion (A): The colour signal consists of only luminance signal

Reason (R): In India PAL colour signal system is used.

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: (d).A is wrong but R is correct
Q346.
To separate channels in FDM receiver we have to use

a.

integration

b.

AND gate

c.

band pass filter

d.

differentiation

Discuss
Answer: (c).band pass filter
Q347.
A device with input x(t) and y(t) is characterized by y(t) = x²(t). An FM signal with frequency deviation of 90 kHz and modulating signal bandwidth of 5 kHz is applied to this device. The bandwidth of the output signal is

a.

370 kHz

b.

190 kHz

c.

380 kHz

d.

95 kHz

Discuss
Answer: (c).380 kHz
Q348.
Assertion (A): Bandwidth of a TV signal is 5 MHz.

Reason (R): TV systems use vestigial side band transmission.

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: (b).Both A and R are correct but R is not correct explanation of A
Q349.
In a satellite system circular polarization is to be obtained. The antenna used is

a.

parabolic

b.

horn

c.

log periodic

d.

helical

Discuss
Answer: (d).helical
Q350.
A horizontal output stage is cutoff for retrace and 40% of trace. If time for each horizontal line is 64 ฮผs and retrace time is 12 ฮผs, the transistor is conducting for about

a.

64 ฮผs

b.

6.4 ฮผs

c.

31 ฮผs

d.

3.1 ฮผs

Discuss
Answer: (c).31 ฮผs
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