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 80 of 120

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Q791.
In FM, the frequency deviation is

a.

always constant

b.

directly proportional to modulating frequency

c.

inversely proportional to modulating frequency

d.

proportional to amplitude of modulating signal

Discuss
Answer: (d).proportional to amplitude of modulating signal
Q792.
If fh(t) is the Hilbert transform of f(t), and f(t) is a real valued signal, the pre-envelope of f(t) is

a.

f(t) - jfh(t)

b.

f(t) + jfh(t)

c.

fh(t) + jf(t)

d.

fh(t) - jf(t)

Discuss
Answer: (b).f(t) + jfh(t)
Q793.
Speech amplifiers are usually operated as

a.

class A

b.

classes AB

c.

class B

d.

class C

Discuss
Answer: (a).class A
Q794.
In which frequency range is the noise figure in a transistor independent of frequency

a.

intermediate frequencies

b.

high frequency

c.

low frequencies

d.

both low and high frequencies

Discuss
Answer: (a).intermediate frequencies
Q795.
Which of the following is likely to be associated with FM radio broadcasting?

a.

90 Hz

b.

90 kHz

c.

900 kHz

d.

90 MHz

Discuss
Answer: (d).90 MHz
Q796.
Diffraction of EM waves

a.

arises only with spherical wave front

b.

may occur around the edge of an obstacle

c.

occurs when waves pass through a big slot

d.

none of the above

Discuss
Answer: (c).occurs when waves pass through a big slot
Q797.
The start of modern computer age was started by the event

a.

development of disc drive

b.

development of transistor

c.

development of Hollerith code

d.

design of EVIAC computer

Discuss
Answer: (b).development of transistor
Q798.
At night D layer of ionosphere is absent.

a.

True

b.

False

c.

May be True or False

d.

Can't say

Discuss
Answer: (a).True
Q799.
Which of the following is not correct?

a.

In SSB amplitude modulated system, the transmitter circuit has to be more stable leading to better reception

b.

In SSB amplitude modulated system more channel space is available as compared to double sideband amplitude modulated system

c.

In SSB amplitude modulated system the signal is more noise resistant as compared to double sideband system

d.

An SSB-AM system requires lesser power (for the same signal strength) as compared to DSB-AM system

Discuss
Answer: (a).In SSB amplitude modulated system, the transmitter circuit has to be more stable leading to better reception
Q800.
Assertion (A): Data communication using digital data must be very accurate.

Reason (R): In analog signals redundancy is available but in digital signals redundancy is not available.

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: (a).Both A and R are correct and R is correct explanation of A
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