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 35 of 120

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Q341.
Assertion (A): Bandwidth of a TV signal is 5 MHz.

Reason (R): TV systems use vestigial side band transmission.

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
Q342.
In a satellite system circular polarization is to be obtained. The antenna used is

a.

parabolic

b.

horn

c.

log periodic

d.

helical

Discuss
Answer: (d).helical
Q343.
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

a.

64 ฮผs

b.

6.4 ฮผs

c.

31 ฮผs

d.

3.1 ฮผs

Discuss
Answer: (c).31 ฮผs
Q344.
A TV remote control works on the principle of

a.

pulse code modulated ultra violet light

b.

pulse code modulated infrared light

c.

demodulation

d.

either (a) or (b)

Discuss
Answer: (b).pulse code modulated infrared light
Q345.
As the magnitude of reverse bias is increased, the capacitance of varactor diode

a.

increases

b.

decreases

c.

first increase, then decreases

d.

first decreases then increases

Discuss
Answer: (b).decreases
Q346.
To prevent overloading in the last IF amplifier one should use

a.

variable sensitivity

b.

squelch

c.

double conversion

d.

variable selectivity

Discuss
Answer: (a).variable sensitivity
Q347.
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
Q348.
Radiation resistance of an antenna is a

a.

dc resistance

b.

ac resistance

c.

either (a) or (b)

d.

none of the above

Discuss
Answer: (b).ac resistance
Q349.
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?

a.

990 kHz

b.

1010 kHz

c.

1020 kHz

d.

1030 kHz

Discuss
Answer: (c).1020 kHz
Q350.
The input to a coherent detector is DSB - SC signal plus noise. The noise at the detector output is

a.

in phase component

b.

quadrature component

c.

zero

d.

the envelope

Discuss
Answer: (a).in phase component
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