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 29 of 120

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Q281.
The effective length of antenna is different from actual length due to

a.

top loading

b.

end effects

c.

both (a) and (b)

d.

none of the above

Discuss
Answer: (c).both (a) and (b)
Q282.
In a TV receiver there is no raster, no picture and no sound. The most likely defective stage is

a.

power supply unit

b.

video output circuit

c.

horizontal oscillator

d.

balun

Discuss
Answer: (a).power supply unit
Q283.
Noise can be measured by

a.

D.C. voltmeter

b.

A.C. voltmeter

c.

either of the above

d.

none of the above

Discuss
Answer: (b).A.C. voltmeter
Q284.
A 100 + j 100 ฮฉ load is to be matched to a line with Z0 = 300 ฮฉ to give SWR = 1. The reactance of stub is

a.

j 200 ฮฉ

b.

-j 200 ฮฉ

c.

j 100 ฮฉ

d.

-j 100 ฮฉ

Discuss
Answer: (b).-j 200 ฮฉ
Q285.
In VHS format each video head is tilted from azimuth by

a.

20°

b.

10°

c.

6°

d.

1°

Discuss
Answer: (c).6°
Q286.
The number of possible colours with a 4 line digital input monitor are

a.

4

b.

16

c.

64

d.

2

Discuss
Answer: (b).16
Q287.
Convolution of x(t + 5) with impulse function ฮด(t - 7) is equal to

a.

x(t - 2)

b.

x(t + 12)

c.

x(t - 12)

d.

(t + 2)

Discuss
Answer: (a).x(t - 2)
Q288.
Which of the following is a better recording medium?

a.

Ferric oxide

b.

Ferrous oxide

c.

Chromium di oxide

d.

Either (a) or (b)

Discuss
Answer: (c).Chromium di oxide
Q289.
An angle modulated signal is given by s(t) = cos 2ฯ€ (2 x 10โถt + 30 sin 150t + 40 cos 150t). The maximum frequency and phase deviations of s(t) are

a.

10.5 kHz, 140ฯ€ rad

b.

6 kHz and 80ฯ€ rad

c.

10.5 kHz, 100ฯ€ rad

d.

7.5 kHz, 100ฯ€ rad

Discuss
Answer: (d).7.5 kHz, 100ฯ€ rad
Q290.
Microwave link repeaters are typically 50 km apart in TV transmission due to

a.

atmosphere attenuation

b.

output power tube limitations

c.

attenuation of surface wave

d.

earth's curvature

Discuss
Answer: (d).earth's curvature
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