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 22 of 120

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Q211.
If aspect ratio is 4/3 and number of lines in each frame is 625, the number of picture elements in one frame is

a.

4/3 x 625

b.

4/3(625)²

c.

625²

d.

3/4(625)²

Discuss
Answer: (b).4/3(625)²
Q212.
Indicate the false statement: If SWR on a transmission line is infinite, the line is terminated in

a.

open circuit

b.

short circuit

c.

pure reactance

d.

complex impedance

Discuss
Answer: (d).complex impedance
Q213.
In TV signals colour burst is used

a.

to maintain colour sequence

b.

to ensure I and Q phase correctly

c.

to synchronise colours

d.

for interlacing of horizontal lines

Discuss
Answer: (b).to ensure I and Q phase correctly
Q214.
The resonant frequency of an RF amplifier is 1 MHz and its bandwidth is 10 kHz. The Q factor will be

a.

10

b.

100

c.

0.01

d.

0.1

Discuss
Answer: (b).100
Q215.
Two sinusoidal signals of same amplitude and frequencies 10 kHz and 10.1 kHz are added together. The combined signal is given to an ideal frequency detector. The output of the detector is

a.

0.1 kHz sinusoidal

b.

10.1 kHz sinusoidal

c.

a linear function

d.

a constant

Discuss
Answer: (b).10.1 kHz sinusoidal
Q216.
In Vidicon camera tube, the resistance of photoconductive material on the target plate

a.

is constant

b.

is more in darkness and less in brightness

c.

is more in brightness but less in darkness and brightness

d.

may be more or less in darkness and brightness

Discuss
Answer: (b).is more in darkness and less in brightness
Q217.
Which of the following are useful in comparing the noise performance of receivers?

1. Input noise voltage
2. Noise figure
3. Noise resistance
4. Noise temperature

Select answer as per the following codes:

a.

1, 2 and 3

b.

1, 3 and 4

c.

2, 3, 4

d.

1, 2, 4

Discuss
Answer: (c).2, 3, 4
Q218.
Push pull amplifier is

a.

class B

b.

class A

c.

class C

d.

Class A or Class C

Discuss
Answer: (a).class B
Q219.
The tape recorders used in homes have

a.

common head and common amplifier system for recording and playback

b.

different heads and amplifiers for recording and playback

c.

same head but different amplifiers for recording and playback

d.

different heads but same amplifier for recording and playback

Discuss
Answer: (a).common head and common amplifier system for recording and playback
Q220.
In a communication system, noise is most likely to affect the signal

a.

at the receiver

b.

at the transmitter

c.

at the information source

d.

in the channel

Discuss
Answer: (d).in the channel
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