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 23 of 120

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Q221.
Assertion (A): A composite video signal has synchronising pulses.

Reason (R): It is necessary to synchronise the scanning process in the transmitter and receiver.
Discuss
Answer: (a).Both A and R are correct and R is correct explanation of A
Q222.
Noise with uniform power spectral density of Nโ‚€ฯ‰/Hz is passed through a filter H(ฯ‰) = 2 exp (-J ฯ‰ ty) followed by an ideal low pass filter of bandwidth B Hz. The output noise power in watts is
Discuss
Answer: (b).4 Nโ‚€B
Q223.
Assertion (A): In standing wave pattern, the nodes and anti nodes are separated by half wave-length

Reason (R): When line is terminated in resistance RL, the standing wave ratio is SWR = Z0/RL or RL/Z0
Discuss
Answer: (b).Both A and R are correct but R is not correct explanation of A
Q224.
An amplifier has an input resistance of 10 kฮฉ and the noise voltage is 10 ฮผV. If two such resistances of 10 kฮฉ each are connected in series at the input, the total noise voltage is about
Discuss
Answer: (c).14.14 ฮผV
Discuss
Answer: (c).a little more than channel width
Q226.
An FM signal with a deviation is passes through the mixer, and has its frequency reduced five fold. The deviation in the output of the mixer is
Discuss
Answer: (a).ฮ”
Q227.
Some advantages of optical fibre cables are

1. small diameter
2. Immunity to cross talk and EM interference
3. Laser and LED modulation methods lend themselves ideally to digital operation

Which of the above are correct?
Discuss
Answer: (c).1, 2, 3
Q228.
The contrast control in colour TV receiver is done by
Discuss
Answer: (d).luminance amplifier
Q229.
The requirements of carrier frequency are
Discuss
Answer: (c).both (a) and (b)
Q230.
If N bits are lumped together to get an N-bit symbol, the possible number of symbols is
Discuss
Answer: (a).2แดบ