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 87 of 120

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Q861.
Which one of the following is an indirect way of generating FM?
Discuss
Answer: (a).Armstrong modulator
Discuss
Answer: (c).get almost uniform S/N ratio
Q863.
Assertion (A): In AM the amplitude of carrier is made proportional to the instantaneous amplitude of modulating wave

Reason (R): In AM, frequency of side band = frequency carrier ± frequency of modulating wave.
Discuss
Answer: (b).Both A and R are correct but R is not correct explanation of A
Discuss
Answer: (c).both (a) and (b)
Q865.
Which of the following oscillator is not in FM?
Discuss
Answer: (b).Hartley oscillator
Q866.
The number of spectral component of impulse wave is
Discuss
Answer: (d).โˆž
Q867.
Assertion (A): If a carrier is modulated by three sine waves and mโ‚, mโ‚‚, mโ‚ƒ are the modulation indices, the total modulation index mt is
mt = (mโ‚² + mโ‚‚² + mโ‚ƒ²)^0.5

Reason (R): An AM, higher the level of modulation, lower is the audio power required to produce modulation.
Discuss
Answer: (c).A is correct but R is wrong
Q868.
If M (jฯ‰) = £[m(t)] where £ denotes Fourier transform, then £[m(t) cos ฯ‰ct] =
Discuss
Answer: (d).1/2 [M (jฯ‰ + jฯ‰c) + M (jฯ‰ - jฯ‰c)]
Discuss
Answer: (c).a small portion of energy is radiated into atmosphere and the remaining energy is reflected
Q870.
Some features of RF stage in good radio receivers is

1. It increases sensitivity by providing amplification to RF signal
2. It eliminates image frequency interference
3. It increases selectivity
4. It reduces noise level

Which of the above are true?
Discuss
Answer: (d).1, 2, 3, 4