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 34 of 120

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Q331.
The radio receivers mostly used now a days are
Discuss
Answer: (b).super heterodyne receivers
Q332.
The reactance of coupling capacitors, for DC quantities, is
Discuss
Answer: (c).infinite
Q333.
An AM wave is given by s(t)AM = 20 (1 + 0.5 cos 10³t + 0.3 cos 10โด t cos 10โถ t) the modulation index of the envelope is
Discuss
Answer: (b).0.58
Q334.
The modulating frequency in frequency modulation is increased from 10 kHz to 30 kHz. The bandwidth is increased by
Discuss
Answer: (a).6
Q335.
An AM signal is detected using an envelope detector, the carrier frequency and modulating signal frequency are 1 MHz and 2 kHz respectively. An appropriate value for the time constant of the envelope detector is
Discuss
Answer: (b).20 ฮผ sec
Discuss
Answer: (c).3/2 times the power of unmodulated carrier
Q337.
If transmitted power is 10 kW, the field strength at a distance d is 50 mV/m. If transmitted power is reduced to 2.5 kW, the field strength at the same point will be
Discuss
Answer: (a).25 mV/m
Q338.
Some features of advanced mobile phone service are

1. To provide telephone communication to a large number of telephone users within the area of a metropolitan only
2. To use minimum amount of frequency spectrum
3. To permit hand held as well as vehicle operation of telephone

Which of the above are true?
Discuss
Answer: (b).1, 2, 3
Q339.
The carrier frequency will be if L = 50 µH and C = 1 nF.
Discuss
Answer: (c).712 kHz
Q340.
Which of the following antennas is circularly polarized?
Discuss
Answer: (d).Helical