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 76 of 120

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Q751.
A resistor R is in parallel with capacitance C. The rms noise voltage of resistor in the equivalent circuit can be written as

a.

kT/C

b.

kTC

c.

kC/T

d.

kT/C²

Discuss
Answer: (a).kT/C
Q752.
Assertion (A): In angle modulation the transmitted amplitude is constant.

Reason (R): Angle modulation has good immunity to noise and interference.

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
Q753.
A 1000 kHz carrier is simultaneously modulated with 300 Hz, 800 Hz and 2 kHz audio sine waves. The frequencies present in the output will be

a.

998 kHz and 1002 kHz

b.

998 kHz, 999.2 kHz, 1000.8 kHz, 1002.0 kHz

c.

998 kHz, 999.2 kHz, 999.7 kHz, 1000.3 kHz, 1000.8 kHz and 1000.2 kHz

d.

none of the above

Discuss
Answer: (c).998 kHz, 999.2 kHz, 999.7 kHz, 1000.3 kHz, 1000.8 kHz and 1000.2 kHz
Q754.
In a certain '12 channel TDM' system it is found that channel no. 3 and channel no. 8 are connected to the same input signal. This technique

a.

wastes the channel capacity

b.

takes care of different sampling rate

c.

is required when different bandwidth signals are to be transmitted

d.

reduces noise

Discuss
Answer: (b).takes care of different sampling rate
Q755.
Which wave is also called surface wave?

a.

Ground wave

b.

Sky wave

c.

Space wave

d.

Both (b) and (c)

Discuss
Answer: (a).Ground wave
Q756.
ADM stands for

a.

Angle Delta Modulation

b.

Angle Digital Modulation

c.

Adaptive Delta Modulation

d.

Adaptive Digital Modulation

Discuss
Answer: (c).Adaptive Delta Modulation
Q757.
The atmospheric absorption of radio waves depends on

a.

frequency of wave

b.

the distance from transmitter

c.

wave polarisation

d.

atmospheric polarisation

Discuss
Answer: (a).frequency of wave
Q758.
In AM increased depth of modulation increases __________ and in FM with increased depth of modulation __________ increases.

a.

total transmitted power, bandwidth

b.

bandwidth, bandwidth

c.

bandwidth, total transmitted power

d.

total transmitted power, sideband power

Discuss
Answer: (a).total transmitted power, bandwidth
Q759.
In a DM system, the granular noise occurs when modulating signal

a.

decrease Rapidly

b.

increase

c.

has high frequency component

d.

change within step size

Discuss
Answer: (c).has high frequency component
Q760.
Huffman code is also known as redundancy code

a.

True

b.

false

c.

in some cases

d.

depend upon efficiency

Discuss
Answer: (a).True
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