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.
In colour TV system the colour sub carrier frequency is 4.43 MHz.

a.

True

b.

False

c.

May be True or False

d.

Can't say

Discuss
Answer: (b).False
Q342.
A transmitter power of 5 W is increased by 20 dB. The effective radiated power is

a.

5 W

b.

100 W

c.

25 W

d.

500 W

Discuss
Answer: (d).500 W
Q343.
The percentage saving in power of 100% modulated suppressed carrier AM signal is

a.

100

b.

75

c.

66.6

d.

50

Discuss
Answer: (c).66.6
Q344.
The maximum distance between television transmission and receiving antennas for reasonably good reception should be

a.

less than 20 km

b.

less than 100 km

c.

less than 500 km

d.

less than 1000 km

Discuss
Answer: (b).less than 100 km
Q345.
Three point tracking is achieved with

a.

double conversion

b.

padder capacitor

c.

double spotting

d.

variable selectivity

Discuss
Answer: (b).padder capacitor
Q346.
In TV transmitter, visual exciter may consist of

1. Video processing unit
2. Visual modulator
3. VSB filter
4. Delay equaliser
5. Frequency converter

Which of the above are actually a part of visual exciter?

a.

1, 2 and 3

b.

2, 3 and 4

c.

1, 2, 3 and 4

d.

1, 2, 3, 4 and 5

Discuss
Answer: (d).1, 2, 3, 4 and 5
Q347.
The positive peak of an AM wave is 16 V and the minimum value is 4 V Assuming single tone modulation, the modulation index is

a.

0.6

b.

0.25

c.

4

d.

0.36

Discuss
Answer: (a).0.6
Q348.
In a circuit the value of resistor is made four times. The noise voltage generated by this resistance will

a.

be doubled

b.

be increased four times

c.

remain the same

d.

become half

Discuss
Answer: (a).be doubled
Q349.
A resistor of 10 kฮฉ has an rms noise voltage of 1 mV under a certain set of conditions. A resistor of 20 kฮฉ under the same conditions will have an rms noise voltage of

a.

1 mV

b.

2 mV

c.

1.414 mV

d.

4 mV

Discuss
Answer: (c).1.414 mV
Q350.
Assertion (A): EM waves are attenuated as they travel outward from a source

Reason (R): Both field intensity and power density follow inverse square law.

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: (a).Both A and R are correct and R is correct explanation of A
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