Railways Exam > Railways Questions > Very large values of modulation index (greate...
Start Learning for Free
Very large values of modulation index (greater than 3.24) lead to
- a)Square AC output voltage
- b)Sine AC output voltage
- c)Triangular AC output voltage
- d)Trapezoidal AC output voltage
Correct answer is option 'A'. Can you explain this answer?
| FREE This question is part of | Download PDF Attempt this Test |
Verified Answer
Very large values of modulation index (greater than 3.24) lead toa)Squ...
Modulation index is used to determine the strength and quality of transmitted signal. If the modulation index is small, then the amount of variation in the carrier amplitude is small. Very large values of modulation index (greater than 3.24) lead to a square AC output voltage.
Most Upvoted Answer
Very large values of modulation index (greater than 3.24) lead toa)Squ...
Explanation:
Modulation Index:
- The modulation index is a measure of the level of modulation in an amplitude modulation (AM) system. It is defined as the ratio of the peak amplitude of the modulating signal to the peak amplitude of the carrier signal.
Effects of High Modulation Index:
- When the modulation index exceeds a certain value (in this case, greater than 3.24), it leads to overmodulation.
- Overmodulation occurs when the modulation index is too high, causing the transmitted signal to become distorted.
Output Voltage:
- In the case of overmodulation, the output voltage waveform becomes distorted and approaches a square wave.
- This means that the AC output voltage will resemble a square wave rather than a sine wave, triangular wave, or trapezoidal wave.
Reason for Square AC Output Voltage:
- The high modulation index causes the peaks of the modulating signal to exceed the peaks of the carrier signal significantly.
- This leads to the flattening of the peaks of the output waveform, resulting in a square-like shape.
Conclusion:
- Therefore, very large values of modulation index greater than 3.24 lead to a square AC output voltage due to overmodulation, where the output waveform becomes distorted and resembles a square wave.
Modulation Index:
- The modulation index is a measure of the level of modulation in an amplitude modulation (AM) system. It is defined as the ratio of the peak amplitude of the modulating signal to the peak amplitude of the carrier signal.
Effects of High Modulation Index:
- When the modulation index exceeds a certain value (in this case, greater than 3.24), it leads to overmodulation.
- Overmodulation occurs when the modulation index is too high, causing the transmitted signal to become distorted.
Output Voltage:
- In the case of overmodulation, the output voltage waveform becomes distorted and approaches a square wave.
- This means that the AC output voltage will resemble a square wave rather than a sine wave, triangular wave, or trapezoidal wave.
Reason for Square AC Output Voltage:
- The high modulation index causes the peaks of the modulating signal to exceed the peaks of the carrier signal significantly.
- This leads to the flattening of the peaks of the output waveform, resulting in a square-like shape.
Conclusion:
- Therefore, very large values of modulation index greater than 3.24 lead to a square AC output voltage due to overmodulation, where the output waveform becomes distorted and resembles a square wave.
Attention Railways Students!
To make sure you are not studying endlessly, EduRev has designed Railways study material, with Structured Courses, Videos, & Test Series. Plus get personalized analysis, doubt solving and improvement plans to achieve a great score in Railways.
|
Explore Courses for Railways exam
|
|
Similar Railways Doubts
Top Courses for RailwaysView all
Very large values of modulation index (greater than 3.24) lead toa)Square AC output voltageb)Sine AC output voltagec)Triangular AC output voltaged)Trapezoidal AC output voltageCorrect answer is option 'A'. Can you explain this answer?
Question Description
Very large values of modulation index (greater than 3.24) lead toa)Square AC output voltageb)Sine AC output voltagec)Triangular AC output voltaged)Trapezoidal AC output voltageCorrect answer is option 'A'. Can you explain this answer? for Railways 2024 is part of Railways preparation. The Question and answers have been prepared according to the Railways exam syllabus. Information about Very large values of modulation index (greater than 3.24) lead toa)Square AC output voltageb)Sine AC output voltagec)Triangular AC output voltaged)Trapezoidal AC output voltageCorrect answer is option 'A'. Can you explain this answer? covers all topics & solutions for Railways 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Very large values of modulation index (greater than 3.24) lead toa)Square AC output voltageb)Sine AC output voltagec)Triangular AC output voltaged)Trapezoidal AC output voltageCorrect answer is option 'A'. Can you explain this answer?.
Very large values of modulation index (greater than 3.24) lead toa)Square AC output voltageb)Sine AC output voltagec)Triangular AC output voltaged)Trapezoidal AC output voltageCorrect answer is option 'A'. Can you explain this answer? for Railways 2024 is part of Railways preparation. The Question and answers have been prepared according to the Railways exam syllabus. Information about Very large values of modulation index (greater than 3.24) lead toa)Square AC output voltageb)Sine AC output voltagec)Triangular AC output voltaged)Trapezoidal AC output voltageCorrect answer is option 'A'. Can you explain this answer? covers all topics & solutions for Railways 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Very large values of modulation index (greater than 3.24) lead toa)Square AC output voltageb)Sine AC output voltagec)Triangular AC output voltaged)Trapezoidal AC output voltageCorrect answer is option 'A'. Can you explain this answer?.
Solutions for Very large values of modulation index (greater than 3.24) lead toa)Square AC output voltageb)Sine AC output voltagec)Triangular AC output voltaged)Trapezoidal AC output voltageCorrect answer is option 'A'. Can you explain this answer? in English & in Hindi are available as part of our courses for Railways.
Download more important topics, notes, lectures and mock test series for Railways Exam by signing up for free.
Here you can find the meaning of Very large values of modulation index (greater than 3.24) lead toa)Square AC output voltageb)Sine AC output voltagec)Triangular AC output voltaged)Trapezoidal AC output voltageCorrect answer is option 'A'. Can you explain this answer? defined & explained in the simplest way possible. Besides giving the explanation of
Very large values of modulation index (greater than 3.24) lead toa)Square AC output voltageb)Sine AC output voltagec)Triangular AC output voltaged)Trapezoidal AC output voltageCorrect answer is option 'A'. Can you explain this answer?, a detailed solution for Very large values of modulation index (greater than 3.24) lead toa)Square AC output voltageb)Sine AC output voltagec)Triangular AC output voltaged)Trapezoidal AC output voltageCorrect answer is option 'A'. Can you explain this answer? has been provided alongside types of Very large values of modulation index (greater than 3.24) lead toa)Square AC output voltageb)Sine AC output voltagec)Triangular AC output voltaged)Trapezoidal AC output voltageCorrect answer is option 'A'. Can you explain this answer? theory, EduRev gives you an
ample number of questions to practice Very large values of modulation index (greater than 3.24) lead toa)Square AC output voltageb)Sine AC output voltagec)Triangular AC output voltaged)Trapezoidal AC output voltageCorrect answer is option 'A'. Can you explain this answer? tests, examples and also practice Railways tests.
|
|
Explore Courses for Railways exam
|
|
Suggested Free Tests
Signup for Free!
Signup to see your scores go up within 7 days! Learn & Practice with 1000+ FREE Notes, Videos & Tests.
|
© EduRev
|
Education Revolution
|
Follow Us
|
Signup to see your scores
go up within 7 days!
Access 1000+ FREE Docs, Videos and Tests
Takes less than 10 seconds to signup