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What is the direction of the electron diffusion current density relative to the electron flux?
- a)Same direction
- b)Opposite to each other
- c)Perpendicular to each other
- d)At 270 degrees to each other
Correct answer is option 'B'. Can you explain this answer?
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What is the direction of the electron diffusion current density relati...
From the graph between electron concentration and the distance, we can see that the direction of the electron diffusion current density is opposite to the electron flux.
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What is the direction of the electron diffusion current density relati...
Electron Diffusion Current Density vs Electron Flux:
The electron diffusion current density and the electron flux are related phenomena in the field of electrical engineering. Let's break down the relationship between these two concepts:
Electron Diffusion Current Density:
- The electron diffusion current density is a measure of the flow of electrons due to diffusion. It is proportional to the concentration gradient of electrons in a material.
- Electron diffusion current density is represented by the symbol Jn.
Electron Flux:
- Electron flux refers to the rate of flow of electrons through a given area. It is a measure of the number of electrons passing through a unit area per unit time.
- Electron flux is represented by the symbol Φn.
Relationship between Electron Diffusion Current Density and Electron Flux:
- The electron diffusion current density and electron flux are related by Fick's first law of diffusion, which states that the diffusion flux is proportional to the negative concentration gradient.
- Therefore, the electron diffusion current density (Jn) and the electron flux (Φn) are in opposite directions to each other. This means that when the concentration gradient increases in a certain direction, the electron diffusion current density flows in the opposite direction to the electron flux.
In conclusion, the electron diffusion current density is opposite in direction to the electron flux. This relationship is crucial in understanding the flow of electrons in materials and is fundamental in the study of electrical engineering.
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What is the direction of the electron diffusion current density relative to the electron flux?a)Same directionb)Opposite to each otherc)Perpendicular to each otherd)At 270 degrees to each otherCorrect answer is option 'B'. Can you explain this answer?
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