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.
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
Q422.
Assertion (A): The colour signal consists of only luminance signal

Reason (R): In India PAL colour signal system is used.

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: (d).A is wrong but R is correct
Q423.
To separate channels in FDM receiver we have to use

a.

integration

b.

AND gate

c.

band pass filter

d.

differentiation

Discuss
Answer: (c).band pass filter
Q424.
A device with input x(t) and y(t) is characterized by y(t) = x²(t). An FM signal with frequency deviation of 90 kHz and modulating signal bandwidth of 5 kHz is applied to this device. The bandwidth of the output signal is

a.

370 kHz

b.

190 kHz

c.

380 kHz

d.

95 kHz

Discuss
Answer: (c).380 kHz
Q425.
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
Q426.
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
Q427.
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
Q428.
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
Q429.
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
Q430.
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
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