Electronics and Communication Engineering (ECE) Exam > Electronics and Communication Engineering (ECE) Questions > In amplitude modulation, the modulation envel...
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In amplitude modulation, the modulation envelope has a peak value which is double the unmodulated carrier value. What is the value of the modulation index ?
- a)25%
- b)50%
- c)75%
- d)100%
Correct answer is option 'D'. Can you explain this answer?
Verified Answer
In amplitude modulation, the modulation envelope has a peak value whic...
Thus α = 1, therefor modulation index is 1 or 100% modulation.Most Upvoted Answer
In amplitude modulation, the modulation envelope has a peak value whic...
Amplitude modulation (AM) is a modulation technique in which the amplitude of the carrier signal is varied in accordance with the message signal. The modulation index is a parameter that describes the extent of amplitude variation in the carrier signal.
Calculation of modulation index:
- The modulation index (m) is defined as the ratio of the amplitude of the message signal (A_m) to the amplitude of the carrier signal (A_c).
- In the given problem, the peak value of the modulation envelope is double the unmodulated carrier value. This means that the amplitude of the modulated signal varies between 0 and 2A_c, with a peak amplitude of 2A_c.
- The amplitude of the message signal can be calculated as (2A_c - A_c)/2 = A_c.
- Therefore, the modulation index is given by m = A_c/A_c = 1.
- The modulation index is expressed as a percentage, so the answer is 100%.
Conclusion:
The modulation index is a measure of the extent of amplitude variation in the carrier signal in amplitude modulation. In the given problem, the modulation index is 100%, which means that the amplitude of the carrier signal varies between 0 and 2A_c, with a peak amplitude of 2A_c.
Calculation of modulation index:
- The modulation index (m) is defined as the ratio of the amplitude of the message signal (A_m) to the amplitude of the carrier signal (A_c).
- In the given problem, the peak value of the modulation envelope is double the unmodulated carrier value. This means that the amplitude of the modulated signal varies between 0 and 2A_c, with a peak amplitude of 2A_c.
- The amplitude of the message signal can be calculated as (2A_c - A_c)/2 = A_c.
- Therefore, the modulation index is given by m = A_c/A_c = 1.
- The modulation index is expressed as a percentage, so the answer is 100%.
Conclusion:
The modulation index is a measure of the extent of amplitude variation in the carrier signal in amplitude modulation. In the given problem, the modulation index is 100%, which means that the amplitude of the carrier signal varies between 0 and 2A_c, with a peak amplitude of 2A_c.
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In amplitude modulation, the modulation envelope has a peak value which is double the unmodulated carrier value. What is the value of the modulation index ?a)25%b)50%c)75%d)100%Correct answer is option 'D'. Can you explain this answer? for Electronics and Communication Engineering (ECE) 2025 is part of Electronics and Communication Engineering (ECE) preparation. The Question and answers have been prepared according to the Electronics and Communication Engineering (ECE) exam syllabus. Information about In amplitude modulation, the modulation envelope has a peak value which is double the unmodulated carrier value. What is the value of the modulation index ?a)25%b)50%c)75%d)100%Correct answer is option 'D'. Can you explain this answer? covers all topics & solutions for Electronics and Communication Engineering (ECE) 2025 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for In amplitude modulation, the modulation envelope has a peak value which is double the unmodulated carrier value. What is the value of the modulation index ?a)25%b)50%c)75%d)100%Correct answer is option 'D'. Can you explain this answer?.
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