Electronics and Communication Engineering (ECE) Exam > Electronics and Communication Engineering (ECE) Questions > The Fermi level in a semiconductor bar should...
Start Learning for Free
The Fermi level in a semiconductor bar should
- a)Be constant as a function of distance, under equilibrium
- b)Be constant as a function of distance, under both equilibrium and non-equilibrium
- c)Vary with distance under equilibrium only
- d)Vary with distance under both equilibrium and non-equilibrium
Correct answer is option 'A'. Can you explain this answer?
| FREE This question is part of | Download PDF Attempt this Test |
Verified Answer
The Fermi level in a semiconductor bar shoulda)Be constant as a functi...
Under equilibrium:
- The fermi level across the entire material will be sum and does not vary with distance.
- If there is any disturbance in the material, like junction contact, injection of impurities at any point, the charge carriers redistribute themselves such that the fermi-potential is same in entire material.
Under non-equilibrium:
- The fermi level is uneven with gradient of charge distribution across distance, in material.
- It can be studied using quasi-fermi states, related to charge distribution.
Most Upvoted Answer
The Fermi level in a semiconductor bar shoulda)Be constant as a functi...
Explanation:
Fermi level is the energy level at which there is a 50% probability of finding an electron. In a semiconductor, the Fermi level is important as it determines the electrical and optical properties of the material. It is a function of temperature and doping concentration.
Constant Fermi level under equilibrium:
Under equilibrium, the Fermi level is constant throughout the material. This is because in equilibrium, there is no net flow of charge, and the material is in a state of balance. The number of electrons in the conduction band is equal to the number of holes in the valence band, and the Fermi level is at the mid-point of the energy gap. This is true for both intrinsic and extrinsic semiconductors.
Varying Fermi level under non-equilibrium:
Under non-equilibrium conditions, the Fermi level can vary with distance. Non-equilibrium conditions occur when there is a flow of charge, such as in a forward-biased diode or during the injection of carriers into a semiconductor. In these cases, there is a gradient in the carrier concentrations, and the Fermi level is not constant throughout the material.
Conclusion:
In conclusion, the Fermi level in a semiconductor bar should be constant as a function of distance under equilibrium conditions. This is because in equilibrium, there is no net flow of charge, and the material is in a state of balance. Under non-equilibrium conditions, the Fermi level can vary with distance due to the gradient in the carrier concentrations.
Fermi level is the energy level at which there is a 50% probability of finding an electron. In a semiconductor, the Fermi level is important as it determines the electrical and optical properties of the material. It is a function of temperature and doping concentration.
Constant Fermi level under equilibrium:
Under equilibrium, the Fermi level is constant throughout the material. This is because in equilibrium, there is no net flow of charge, and the material is in a state of balance. The number of electrons in the conduction band is equal to the number of holes in the valence band, and the Fermi level is at the mid-point of the energy gap. This is true for both intrinsic and extrinsic semiconductors.
Varying Fermi level under non-equilibrium:
Under non-equilibrium conditions, the Fermi level can vary with distance. Non-equilibrium conditions occur when there is a flow of charge, such as in a forward-biased diode or during the injection of carriers into a semiconductor. In these cases, there is a gradient in the carrier concentrations, and the Fermi level is not constant throughout the material.
Conclusion:
In conclusion, the Fermi level in a semiconductor bar should be constant as a function of distance under equilibrium conditions. This is because in equilibrium, there is no net flow of charge, and the material is in a state of balance. Under non-equilibrium conditions, the Fermi level can vary with distance due to the gradient in the carrier concentrations.
Attention Electronics and Communication Engineering (ECE) Students!
To make sure you are not studying endlessly, EduRev has designed Electronics and Communication Engineering (ECE) study material, with Structured Courses, Videos, & Test Series. Plus get personalized analysis, doubt solving and improvement plans to achieve a great score in Electronics and Communication Engineering (ECE).
|
Explore Courses for Electronics and Communication Engineering (ECE) exam
|
|
Similar Electronics and Communication Engineering (ECE) Doubts
Top Courses for Electronics and Communication Engineering (ECE)View all
The Fermi level in a semiconductor bar shoulda)Be constant as a function of distance, under equilibriumb)Be constant as a function of distance, under both equilibrium and non-equilibriumc)Vary with distance under equilibrium onlyd)Vary with distance under both equilibrium and non-equilibriumCorrect answer is option 'A'. Can you explain this answer?
Question Description
The Fermi level in a semiconductor bar shoulda)Be constant as a function of distance, under equilibriumb)Be constant as a function of distance, under both equilibrium and non-equilibriumc)Vary with distance under equilibrium onlyd)Vary with distance under both equilibrium and non-equilibriumCorrect answer is option 'A'. 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 The Fermi level in a semiconductor bar shoulda)Be constant as a function of distance, under equilibriumb)Be constant as a function of distance, under both equilibrium and non-equilibriumc)Vary with distance under equilibrium onlyd)Vary with distance under both equilibrium and non-equilibriumCorrect answer is option 'A'. 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 The Fermi level in a semiconductor bar shoulda)Be constant as a function of distance, under equilibriumb)Be constant as a function of distance, under both equilibrium and non-equilibriumc)Vary with distance under equilibrium onlyd)Vary with distance under both equilibrium and non-equilibriumCorrect answer is option 'A'. Can you explain this answer?.
The Fermi level in a semiconductor bar shoulda)Be constant as a function of distance, under equilibriumb)Be constant as a function of distance, under both equilibrium and non-equilibriumc)Vary with distance under equilibrium onlyd)Vary with distance under both equilibrium and non-equilibriumCorrect answer is option 'A'. 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 The Fermi level in a semiconductor bar shoulda)Be constant as a function of distance, under equilibriumb)Be constant as a function of distance, under both equilibrium and non-equilibriumc)Vary with distance under equilibrium onlyd)Vary with distance under both equilibrium and non-equilibriumCorrect answer is option 'A'. 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 The Fermi level in a semiconductor bar shoulda)Be constant as a function of distance, under equilibriumb)Be constant as a function of distance, under both equilibrium and non-equilibriumc)Vary with distance under equilibrium onlyd)Vary with distance under both equilibrium and non-equilibriumCorrect answer is option 'A'. Can you explain this answer?.
Solutions for The Fermi level in a semiconductor bar shoulda)Be constant as a function of distance, under equilibriumb)Be constant as a function of distance, under both equilibrium and non-equilibriumc)Vary with distance under equilibrium onlyd)Vary with distance under both equilibrium and non-equilibriumCorrect answer is option 'A'. Can you explain this answer? in English & in Hindi are available as part of our courses for Electronics and Communication Engineering (ECE).
Download more important topics, notes, lectures and mock test series for Electronics and Communication Engineering (ECE) Exam by signing up for free.
Here you can find the meaning of The Fermi level in a semiconductor bar shoulda)Be constant as a function of distance, under equilibriumb)Be constant as a function of distance, under both equilibrium and non-equilibriumc)Vary with distance under equilibrium onlyd)Vary with distance under both equilibrium and non-equilibriumCorrect answer is option 'A'. Can you explain this answer? defined & explained in the simplest way possible. Besides giving the explanation of
The Fermi level in a semiconductor bar shoulda)Be constant as a function of distance, under equilibriumb)Be constant as a function of distance, under both equilibrium and non-equilibriumc)Vary with distance under equilibrium onlyd)Vary with distance under both equilibrium and non-equilibriumCorrect answer is option 'A'. Can you explain this answer?, a detailed solution for The Fermi level in a semiconductor bar shoulda)Be constant as a function of distance, under equilibriumb)Be constant as a function of distance, under both equilibrium and non-equilibriumc)Vary with distance under equilibrium onlyd)Vary with distance under both equilibrium and non-equilibriumCorrect answer is option 'A'. Can you explain this answer? has been provided alongside types of The Fermi level in a semiconductor bar shoulda)Be constant as a function of distance, under equilibriumb)Be constant as a function of distance, under both equilibrium and non-equilibriumc)Vary with distance under equilibrium onlyd)Vary with distance under both equilibrium and non-equilibriumCorrect answer is option 'A'. Can you explain this answer? theory, EduRev gives you an
ample number of questions to practice The Fermi level in a semiconductor bar shoulda)Be constant as a function of distance, under equilibriumb)Be constant as a function of distance, under both equilibrium and non-equilibriumc)Vary with distance under equilibrium onlyd)Vary with distance under both equilibrium and non-equilibriumCorrect answer is option 'A'. Can you explain this answer? tests, examples and also practice Electronics and Communication Engineering (ECE) tests.
|
|
Explore Courses for Electronics and Communication Engineering (ECE) 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.
x
![]()
For Your Perfect Score in Electronics and Communication Engineering (ECE)
The Best you need at One Place
|
© 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