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
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
Discuss
Answer: (d).9 kHz
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
Discuss
Answer: (c).14.4 kHz
Q85.
Modulation is also called detection.
Discuss
Answer: (b).False
Q86.
If B is channel bandwidth, S is signal power and N is the total noise within the channel bandwidth, the channel capacity C of a white band limited gaussian channel is

a.

A

b.

B

c.

C

d.

D

Discuss
Answer: (a).A
Q87.
For an RC low pass filter, the relation between noise bandwidth BN and 3-dB bandwidth B3dB is

a.

A

b.

B

c.

C

d.

D

Discuss
Answer: (a).A
Q88.
The block diagram of AM transmitter in which high level modulation is used as shown in figure. The block X could be
Discuss
Answer: (b).buffer RF amplifier
Q89.
When E1, E2, E3 etc. are the simultaneous modulating voltages, then the total modulating voltage Et will be

a.

A

b.

B

c.

C

d.

D

Discuss
Answer: (c).C
Q90.
The constellation diagram of a modem has four states as shown in the figure given below. What is the bit rate of this modem?
Discuss
Answer: (a).Two times its band rate