- #1
Syazani Zulkhairi
Yeah, where does it comes from?
The formula I = -e/T represents the relationship between the current (I) flowing through a material and the temperature (T) of that material. It is known as the thermionic emission equation and is used to describe the flow of electrons from a heated surface.
This formula was first proposed by the scientist J.J. Thomson in 1906. He was studying the behavior of electrons in a vacuum, and through his experiments, he discovered that the current flowing through a material is inversely proportional to its temperature.
The formula I = -e/T can be derived from the principle of thermionic emission, which states that electrons can be emitted from a heated surface. By applying the laws of thermodynamics and quantum mechanics, the equation can be derived to describe the relationship between the current and temperature of a material.
No, this formula is only applicable to materials that exhibit thermionic emission, meaning they release electrons when heated. This includes metals, semiconductors, and certain gases. Other materials, such as insulators, do not follow this relationship.
Yes, there are some limitations to this formula. It assumes that the material is in a vacuum and that the temperature is constant. In reality, there may be other factors that can affect the current, such as impurities in the material or changes in the temperature. Additionally, this formula only applies to steady-state conditions and may not accurately predict the behavior of the material under transient conditions.