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 43 of 120

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Q421.
A horizontal output stage is cutoff for retrace and 40% of trace. If time for each horizontal line is 64 ฮผs and retrace time is 12 ฮผs, the transistor is conducting for about
Discuss
Answer: (c).31 ฮผs
Discuss
Answer: (b).pulse code modulated infrared light
Q423.
As the magnitude of reverse bias is increased, the capacitance of varactor diode
Discuss
Answer: (b).decreases
Q424.
To prevent overloading in the last IF amplifier one should use
Discuss
Answer: (a).variable sensitivity
Q425.
The number of spectral component when two cosine waves are multiplied of different frequency

a.

1

b.

2

c.

8

d.

4

Discuss
Answer: (d).4
Q426.
Radiation resistance of an antenna is a
Discuss
Answer: (b).ac resistance
Q427.
A 1 MHz sinusoidal carrier is amplitude modulated by a symmetrical square wave of period 100 ฮผ sec. Which of the following frequencies will not be in the modulated signal?
Discuss
Answer: (c).1020 kHz
Q428.
The input to a coherent detector is DSB - SC signal plus noise. The noise at the detector output is
Discuss
Answer: (a).in phase component
Q429.
All of the output pulses are at full transmitter power for a strong signal in all of the following except
Discuss
Answer: (b).PAM
Discuss
Answer: (d).twisted nematic crystal