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There are two energy levels E1 and E2 . E1 is E eV above the fermi level and E2 is E eV below the fermi level.
P1 = the probability of E1 being occupied by an electron.
P2= the probability of E2 being empty.
Then, which of the following is correct?
- a)P1>P2
- b)P1 = P2
- c)P1
- d)P1 And P2 depend on number of free electrons.
Correct answer is option 'C'. Can you explain this answer?
Most Upvoted Answer
There are two energy levels E1 and E2 . E1 is E eV above the fermi le...
The Fermi- Dirac probability function also called Fermi function, provides the probability of occupancy of energy levels. It is given by
where EF is Fermi level or Characteristics energy, for the crystal in eV. The fermi level represents the energy state with 50 percent probability of being filled if no forbidden band exists.
Therefore, P1 And P2 can be calculated by using Fermi- Dirac probability function.
For P1
For P2
therefore,
P1 < />2
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There are two energy levels E1 and E2 . E1 is E eV above the fermi le...
Explanation:
The given question is related to the probability of occupying energy levels above and below the Fermi level in a system. Let's analyze the options and find the correct answer.
a) P1 > P2:
According to this option, the probability of occupying the energy level E1 above the Fermi level is greater than the probability of the energy level E2 being empty. This statement is not necessarily true. The occupancy probabilities depend on the Fermi-Dirac distribution function, which is determined by temperature and energy levels. Without any specific information about the system, we cannot conclude that P1 is always greater than P2.
b) P1 = P2:
This option states that the probability of occupying E1 and the probability of E2 being empty are equal. Again, without any specific information, we cannot determine whether these probabilities are equal. Therefore, this option cannot be considered as the correct answer.
c) P1:
This option suggests that only P1 is the correct answer. In other words, the probability of occupying the energy level E1 is the correct probability. This statement is not justified as we do not have any information to support this claim. Therefore, this option cannot be considered as the correct answer.
d) P1 and P2 depend on the number of free electrons:
This option suggests that both P1 and P2 depend on the number of free electrons in the system. This statement is correct and can be considered as the correct answer. The occupancy probabilities depend on the number of available energy levels and the number of electrons that can occupy those levels. The Fermi-Dirac distribution function takes into account the number of free electrons and determines the probabilities of occupation for each energy level.
Therefore, the correct answer is option 'd) P1 and P2 depend on the number of free electrons.'
The given question is related to the probability of occupying energy levels above and below the Fermi level in a system. Let's analyze the options and find the correct answer.
a) P1 > P2:
According to this option, the probability of occupying the energy level E1 above the Fermi level is greater than the probability of the energy level E2 being empty. This statement is not necessarily true. The occupancy probabilities depend on the Fermi-Dirac distribution function, which is determined by temperature and energy levels. Without any specific information about the system, we cannot conclude that P1 is always greater than P2.
b) P1 = P2:
This option states that the probability of occupying E1 and the probability of E2 being empty are equal. Again, without any specific information, we cannot determine whether these probabilities are equal. Therefore, this option cannot be considered as the correct answer.
c) P1:
This option suggests that only P1 is the correct answer. In other words, the probability of occupying the energy level E1 is the correct probability. This statement is not justified as we do not have any information to support this claim. Therefore, this option cannot be considered as the correct answer.
d) P1 and P2 depend on the number of free electrons:
This option suggests that both P1 and P2 depend on the number of free electrons in the system. This statement is correct and can be considered as the correct answer. The occupancy probabilities depend on the number of available energy levels and the number of electrons that can occupy those levels. The Fermi-Dirac distribution function takes into account the number of free electrons and determines the probabilities of occupation for each energy level.
Therefore, the correct answer is option 'd) P1 and P2 depend on the number of free electrons.'
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There are two energy levels E1 and E2 . E1 is E eV above the fermi level and E2 is E eV below the fermi level.P1 = the probability of E1 being occupied by an electron.P2= the probability of E2 being empty.Then, which of the following is correct?a)P1>P2b)P1 = P2c)P1d)P1 And P2 depend on number of free electrons.Correct answer is option 'C'. Can you explain this answer?
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There are two energy levels E1 and E2 . E1 is E eV above the fermi level and E2 is E eV below the fermi level.P1 = the probability of E1 being occupied by an electron.P2= the probability of E2 being empty.Then, which of the following is correct?a)P1>P2b)P1 = P2c)P1d)P1 And P2 depend on number of free electrons.Correct answer is option 'C'. 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 There are two energy levels E1 and E2 . E1 is E eV above the fermi level and E2 is E eV below the fermi level.P1 = the probability of E1 being occupied by an electron.P2= the probability of E2 being empty.Then, which of the following is correct?a)P1>P2b)P1 = P2c)P1d)P1 And P2 depend on number of free electrons.Correct answer is option 'C'. 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 There are two energy levels E1 and E2 . E1 is E eV above the fermi level and E2 is E eV below the fermi level.P1 = the probability of E1 being occupied by an electron.P2= the probability of E2 being empty.Then, which of the following is correct?a)P1>P2b)P1 = P2c)P1d)P1 And P2 depend on number of free electrons.Correct answer is option 'C'. Can you explain this answer?.
There are two energy levels E1 and E2 . E1 is E eV above the fermi level and E2 is E eV below the fermi level.P1 = the probability of E1 being occupied by an electron.P2= the probability of E2 being empty.Then, which of the following is correct?a)P1>P2b)P1 = P2c)P1d)P1 And P2 depend on number of free electrons.Correct answer is option 'C'. 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 There are two energy levels E1 and E2 . E1 is E eV above the fermi level and E2 is E eV below the fermi level.P1 = the probability of E1 being occupied by an electron.P2= the probability of E2 being empty.Then, which of the following is correct?a)P1>P2b)P1 = P2c)P1d)P1 And P2 depend on number of free electrons.Correct answer is option 'C'. 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 There are two energy levels E1 and E2 . E1 is E eV above the fermi level and E2 is E eV below the fermi level.P1 = the probability of E1 being occupied by an electron.P2= the probability of E2 being empty.Then, which of the following is correct?a)P1>P2b)P1 = P2c)P1d)P1 And P2 depend on number of free electrons.Correct answer is option 'C'. Can you explain this answer?.
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