Amplitude and Frequency Modulation MCQs

Welcome to our comprehensive collection of Multiple Choice Questions (MCQs) on Amplitude and Frequency Modulation, a fundamental topic in the field of Avionics Engineering. Whether you're preparing for competitive exams, honing your problem-solving skills, or simply looking to enhance your abilities in this field, our Amplitude and Frequency Modulation 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 Amplitude and Frequency Modulation mcq questions that explore various aspects of Amplitude and Frequency Modulation problems. Each MCQ is crafted to challenge your understanding of Amplitude and Frequency Modulation principles, enabling you to refine your problem-solving techniques. Whether you're a student aiming to ace Avionics Engineering tests, a job seeker preparing for interviews, or someone simply interested in sharpening their skills, our Amplitude and Frequency Modulation MCQs are your pathway to success in mastering this essential Avionics Engineering topic.

Note: Each of the following question comes with multiple answer choices. Select the most appropriate option and test your understanding of Amplitude and Frequency Modulation. 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 Amplitude and Frequency Modulation knowledge to the test? Let's get started with our carefully curated MCQs!

Amplitude and Frequency Modulation MCQs | Page 6 of 7

Q51.
What is the modulation index of a system with modulating frequency 75 kHz and maximum frequency deviation 15 kHz?

a.

5

b.

7

c.

3

d.

1

Discuss
Answer: (a).5
Q52.
What is the deviation ratio if the maximum deviation is 25 kHz and the maximum modulating frequency is 15 kHz?
Discuss
Answer: (b).1.667
Q53.
What is it called when an FM signal occupies no more spectrum space than AM signal?
Discuss
Answer: (b).Narrowband FM
Q54.
What is the modulation index for the FM to behave as a narrowband?
Discuss
Answer: (c).0.25
Q55.
What is the number of significant sidebands produced when the bandwidth of the signal is 24 kHz and the modulating frequency is 3 kHz?

a.

4

b.

5

c.

6

d.

7

Discuss
Answer: (a).4
Q56.
According to Carson’s rule, what is the bandwidth of the signal with a deviation of 30 kHz and a maximum modulating signal of frequency 5 kHz?
Discuss
Answer: (a).70 kHz
Q57.
Which of the following is not a source of noise in FM?
Discuss
Answer: (d).Velocity of motion
Q58.
Which circuit in FM receivers cancels or filters out noise?
Discuss
Answer: (c).Limiter circuits
Q59.
Noise introduces a frequency variation into the signal.
Discuss
Answer: (a).True
Q60.
What is the frequency deviation produced by noise if the signal to noise ratio is 3:1 and modulating frequency is 800 Hz?
Discuss
Answer: (d).271.8 Hz
Page 6 of 7