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 7 of 120

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Q61.
The rate at which information can be carried through a communication channel depends on

a.

carrier frequency

b.

bandwidth

c.

transmission loss

d.

transmitted power

Discuss
Answer: (b).bandwidth
Q62.
Some types of traps used in video IF amplifier of colour TV are

a.

shunt traps

b.

series traps

c.

absorption traps

d.

all of the above

Discuss
Answer: (d).all of the above
Q63.
Direct and reflected sound waves may interfere with each other.

a.

True

b.

False

c.

May be True or False

d.

Can't say

Discuss
Answer: (b).False
Q64.
A carrier is simultaneously modulated by two sine waves having modulation indices of 0.4 and 0.3. The total modulation index will be

a.

0.1

b.

0.7

c.

0.5

d.

0.35

Discuss
Answer: (c).0.5
Q65.
A 1000 kHz carrier is simultaneously modulated with 300 Hz, 800 Hz and 2 kHz audio sine waves. Which of the following frequency is least likely to be present in the output?

a.

1002 kHz

b.

1000 kHz

c.

999.2 kHz

d.

998.0 kHz

Discuss
Answer: (b).1000 kHz
Q66.
A 400 W carrier is amplitude modulated with m = 0.75. The total power in AM is

a.

400 W

b.

512 W

c.

588 W

d.

650 W

Discuss
Answer: (b).512 W
Q67.
c(t) and m(t) are used to generate an FM signal. If the peak frequency deviation of the generated FM signal is three times the transmission bandwidth of the AM signal, then the coefficient of the term cos [2ฯ€(1008 x 10³t)] in the FM signal (in terms of the Bessel Coefficients) is

a.

5 Jโ‚„(3)

b.

5/2 Jโ‚ˆ(3)

c.

5/2 Jโ‚ˆ(4)

d.

5 Jโ‚„(6)

Discuss
Answer: (d).5 Jโ‚„(6)
Q68.
Non-coherently detection is not possible for

a.

PSK

b.

ASK

c.

FSK

d.

both (a) and (c)

Discuss
Answer: (a).PSK
Q69.
Tracking of extra terrestrial objects requires

a.

high transmitting power

b.

very sensitive receiver

c.

fully steerable antenna

d.

all of the above

Discuss
Answer: (d).all of the above
Q70.
Assertion (A): Free space does not interfere with normal radiation and propagation of radio waves

Reason (R): Free space has no magnetic or gravitational fields.

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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