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Consider the following statements associated with different types of noise occurring in nature:
1. The flicker noise occurs at high operating frequencies (few MHz).
2. Shot noise is produced due to random variations in the arrival of electrons at the output electrode of an amplifying device.
3. The thermal noise is proportional to temperature and the value of the resistance and is independent of bandwidth.
4. Noise can also be represented by fictitious temperature called noise temperature.
Which of the statements given above is/are not correct?
1. The flicker noise occurs at high operating frequencies (few MHz).
2. Shot noise is produced due to random variations in the arrival of electrons at the output electrode of an amplifying device.
3. The thermal noise is proportional to temperature and the value of the resistance and is independent of bandwidth.
4. Noise can also be represented by fictitious temperature called noise temperature.
Which of the statements given above is/are not correct?
- a)1 and 4
- b)2 only
- c)1 and 3
- d)3 only
Correct answer is option 'C'. Can you explain this answer?
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Verified Answer
Consider the following statements associated with different types of n...
- The flicker noise occurs at low operating frequencies (few KHz). Hence, statement-1 is not correct.
- The thermal noise voltage is given by,
Hence, it is proportional to temperature, bandwidth and the value of resistance. Thus, statement-3 is not correct. - Statements 1 and 4 are correct.
Most Upvoted Answer
Consider the following statements associated with different types of n...
Statement 1: The flicker noise occurs at high operating frequencies (few MHz).
- This statement is incorrect. Flicker noise, also known as 1/f noise or pink noise, is a type of noise that occurs at low frequencies, typically below 10 kHz. It is characterized by a decrease in power spectral density as the frequency increases.
Statement 2: Shot noise is produced due to random variations in the arrival of electrons at the output electrode of an amplifying device.
- This statement is correct. Shot noise is a type of noise that arises from the discrete nature of electric charge. It is produced by random fluctuations in the arrival of electrons at the output electrode of a device, such as a vacuum tube or transistor.
Statement 3: The thermal noise is proportional to temperature and the value of the resistance and is independent of bandwidth.
- This statement is correct. Thermal noise, also known as Johnson-Nyquist noise, is a type of noise that arises from the random thermal motion of charge carriers, such as electrons, in a conductor. It is proportional to temperature and the value of the resistance, and it is independent of bandwidth.
Statement 4: Noise can also be represented by a fictitious temperature called noise temperature.
- This statement is correct. Noise can be characterized by a fictitious temperature called noise temperature, which represents the amount of thermal noise power that would produce the same noise power as the actual noise source at a reference temperature. It allows noise from different sources to be compared and combined in a straightforward manner.
Therefore, the incorrect statements are:
- Statement 1: The flicker noise occurs at high operating frequencies (few MHz).
- Statement 3: The thermal noise is proportional to temperature and the value of the resistance and is independent of bandwidth.
Hence, the correct answer is option C) 1 and 3.
- This statement is incorrect. Flicker noise, also known as 1/f noise or pink noise, is a type of noise that occurs at low frequencies, typically below 10 kHz. It is characterized by a decrease in power spectral density as the frequency increases.
Statement 2: Shot noise is produced due to random variations in the arrival of electrons at the output electrode of an amplifying device.
- This statement is correct. Shot noise is a type of noise that arises from the discrete nature of electric charge. It is produced by random fluctuations in the arrival of electrons at the output electrode of a device, such as a vacuum tube or transistor.
Statement 3: The thermal noise is proportional to temperature and the value of the resistance and is independent of bandwidth.
- This statement is correct. Thermal noise, also known as Johnson-Nyquist noise, is a type of noise that arises from the random thermal motion of charge carriers, such as electrons, in a conductor. It is proportional to temperature and the value of the resistance, and it is independent of bandwidth.
Statement 4: Noise can also be represented by a fictitious temperature called noise temperature.
- This statement is correct. Noise can be characterized by a fictitious temperature called noise temperature, which represents the amount of thermal noise power that would produce the same noise power as the actual noise source at a reference temperature. It allows noise from different sources to be compared and combined in a straightforward manner.
Therefore, the incorrect statements are:
- Statement 1: The flicker noise occurs at high operating frequencies (few MHz).
- Statement 3: The thermal noise is proportional to temperature and the value of the resistance and is independent of bandwidth.
Hence, the correct answer is option C) 1 and 3.
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Consider the following statements associated with different types of noise occurring in nature:1. The flicker noise occurs at high operating frequencies (few MHz).2. Shot noise is produced due to random variations in the arrival of electrons at the output electrode of an amplifying device.3. The thermal noise is proportional to temperature and the value of the resistance and is independent of bandwidth.4. Noise can also be represented by fictitious temperature called noise temperature.Which of the statements given above is/are not correct?a)1 and 4b)2 onlyc)1 and 3d)3 onlyCorrect answer is option 'C'. Can you explain this answer?
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Consider the following statements associated with different types of noise occurring in nature:1. The flicker noise occurs at high operating frequencies (few MHz).2. Shot noise is produced due to random variations in the arrival of electrons at the output electrode of an amplifying device.3. The thermal noise is proportional to temperature and the value of the resistance and is independent of bandwidth.4. Noise can also be represented by fictitious temperature called noise temperature.Which of the statements given above is/are not correct?a)1 and 4b)2 onlyc)1 and 3d)3 onlyCorrect answer is option 'C'. Can you explain this answer? for Electronics and Communication Engineering (ECE) 2024 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 Consider the following statements associated with different types of noise occurring in nature:1. The flicker noise occurs at high operating frequencies (few MHz).2. Shot noise is produced due to random variations in the arrival of electrons at the output electrode of an amplifying device.3. The thermal noise is proportional to temperature and the value of the resistance and is independent of bandwidth.4. Noise can also be represented by fictitious temperature called noise temperature.Which of the statements given above is/are not correct?a)1 and 4b)2 onlyc)1 and 3d)3 onlyCorrect answer is option 'C'. Can you explain this answer? covers all topics & solutions for Electronics and Communication Engineering (ECE) 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Consider the following statements associated with different types of noise occurring in nature:1. The flicker noise occurs at high operating frequencies (few MHz).2. Shot noise is produced due to random variations in the arrival of electrons at the output electrode of an amplifying device.3. The thermal noise is proportional to temperature and the value of the resistance and is independent of bandwidth.4. Noise can also be represented by fictitious temperature called noise temperature.Which of the statements given above is/are not correct?a)1 and 4b)2 onlyc)1 and 3d)3 onlyCorrect answer is option 'C'. Can you explain this answer?.
Consider the following statements associated with different types of noise occurring in nature:1. The flicker noise occurs at high operating frequencies (few MHz).2. Shot noise is produced due to random variations in the arrival of electrons at the output electrode of an amplifying device.3. The thermal noise is proportional to temperature and the value of the resistance and is independent of bandwidth.4. Noise can also be represented by fictitious temperature called noise temperature.Which of the statements given above is/are not correct?a)1 and 4b)2 onlyc)1 and 3d)3 onlyCorrect answer is option 'C'. Can you explain this answer? for Electronics and Communication Engineering (ECE) 2024 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 Consider the following statements associated with different types of noise occurring in nature:1. The flicker noise occurs at high operating frequencies (few MHz).2. Shot noise is produced due to random variations in the arrival of electrons at the output electrode of an amplifying device.3. The thermal noise is proportional to temperature and the value of the resistance and is independent of bandwidth.4. Noise can also be represented by fictitious temperature called noise temperature.Which of the statements given above is/are not correct?a)1 and 4b)2 onlyc)1 and 3d)3 onlyCorrect answer is option 'C'. Can you explain this answer? covers all topics & solutions for Electronics and Communication Engineering (ECE) 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Consider the following statements associated with different types of noise occurring in nature:1. The flicker noise occurs at high operating frequencies (few MHz).2. Shot noise is produced due to random variations in the arrival of electrons at the output electrode of an amplifying device.3. The thermal noise is proportional to temperature and the value of the resistance and is independent of bandwidth.4. Noise can also be represented by fictitious temperature called noise temperature.Which of the statements given above is/are not correct?a)1 and 4b)2 onlyc)1 and 3d)3 onlyCorrect answer is option 'C'. Can you explain this answer?.
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ample number of questions to practice Consider the following statements associated with different types of noise occurring in nature:1. The flicker noise occurs at high operating frequencies (few MHz).2. Shot noise is produced due to random variations in the arrival of electrons at the output electrode of an amplifying device.3. The thermal noise is proportional to temperature and the value of the resistance and is independent of bandwidth.4. Noise can also be represented by fictitious temperature called noise temperature.Which of the statements given above is/are not correct?a)1 and 4b)2 onlyc)1 and 3d)3 onlyCorrect answer is option 'C'. Can you explain this answer? tests, examples and also practice Electronics and Communication Engineering (ECE) tests.
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