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 9 of 120

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Q81.
In major diatonic musical scale, an octave is divided into

a.

12 intervals

b.

10 intervals

c.

7 intervals

d.

5 intervals

Discuss
Answer: (c).7 intervals
Q82.
The bandwidth of DSB suppressed carrier modulation system when the modulating frequency varies between 500 Hz and 5 kHz is

a.

555 kHz

b.

505 kHz

c.

500 kHz

d.

9 kHz

Discuss
Answer: (d).9 kHz
Q83.
The filter circuit for feeding a wooffer has

a.

an inductance in series and capacitance in parallel

b.

a capacitance in series and an inductance in parallel

c.

a resistance in series and an inductance in parallel

d.

an inductance in series and a resistance in parallel

Discuss
Answer: (a).an inductance in series and capacitance in parallel
Q84.
In an FM system, when the AF is 500 Hz and the AF voltage is 2.4 V, the deviation is 4.8 kHz. If the AF voltage is now increased to 7.2 V, the new deviation will be

a.

4.8 kHz

b.

9.6 kHz

c.

14.4 kHz

d.

28.8 kHz

Discuss
Answer: (c).14.4 kHz
Q85.
Modulation is also called detection.

a.

True

b.

False

c.

May be True or False

d.

Can't say

Discuss
Answer: (b).False
Q86.
The maximum range of a transmitter depends on

a.

its frequency

b.

its power

c.

both its frequency and power

d.

none of the above

Discuss
Answer: (c).both its frequency and power
Q87.
Consider the following statements about Yagi Uda antenna

1. It is unidirectional
2. Its gain is about 7 dB
3. It is used at VLF
4. The optimum separation is 0.11

Which of the above are correct?

a.

1 and 2 only

b.

1, 2, 4 only

c.

1, 2, 3, 4

d.

1 and 4 only

Discuss
Answer: (b).1, 2, 4 only
Q88.
In a two stage cascade amplifier, each stage has a gain of 10 dB and noise figure of 10 dB. The overall noise factor is

a.

10

b.

1.09

c.

1

d.

10.9

Discuss
Answer: (d).10.9
Q89.
An AM signal and a narrowband FM signal with identical carriers, modulating signals and modulation index of 0.1 are added together. The resultant signal can be closely approximated by

a.

Broadband FM

b.

SSB with carrier

c.

DSB-SC

d.

SSB without carrier

Discuss
Answer: (b).SSB with carrier
Q90.
The equation v(t) = A cos [ฯ‰ct + ฯ†(t)] where A and ฯ‰c are constant and ฯ†(t) is a function of base signal represents

1. Phase modulation
2. Amplitude modulation
3. Angle modulation
4. Frequency modulation

Which of the above are true?

a.

3 only

b.

1, 3 and 4

c.

1, 2, 3, 4

d.

3 and 4 only

Discuss
Answer: (b).1, 3 and 4
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