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ggandy
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Can we call it free electron that moves between nonconductor by friction?
ggandy said:Can we call it free electron that moves between nonconductor by friction?
1. noncoductor. for example a fur, a ebonite barZapperZ said:This is so puzzling, it is making no sense.
1. Is a "nonconductor" an insulator?
2. What exactly is "friction" for an electron in a solid?
3. Why can't a "free electron" be an electron in zero potential? Why is that definition not sufficient?
Zz.
ggandy said:1. noncoductor. for example a fur, a ebonite bar
2. between a fur and a ebonite bar
3. I'm sorry about that is not sufficient. Maybe it cause my english level is not high. I'm a Korean science teacher in the middle school.
In our country, In general we teach free elctrons exist only in metal materials. but today my students asked me why we can't call it free electron that moves between a fur and a ebonite bar. and he asked me " Isn't it free?"
so I need a help.
Should I call it a bound electron?ggandy said:1. noncoductor. for example a fur, a ebonite bar
2. between a fur and a ebonite bar
3. I'm sorry about that is not sufficient. Maybe it cause my english level is not high. I'm a Korean science teacher in the middle school.
In our country, In general we teach free elctrons exist only in metal materials. but today my students asked me why we can't call it free electron that moves between a fur and a ebonite bar. and he asked me " Isn't it free?"
so I need a help.
http://cafe.naver.com/ggandyscience3/3169ZapperZ said:Then we definitely have communication/language issues.
If what I'm guessing is correct, you are talking about static electricity and the "spark" that occurs between two surfaces. Tell your students that this spark is NOT "free electrons". Rather, it is a complex process of electrons ionizing gasses/air molecules, etc.
Tell your students that free electrons are electrons moving in a constant potential energy. The electrons in a conductor are APPROXIMATELY free, because they are moving in a weak periodic potential that sometime can be approximated as being free.
There is no "friction" in the motion of electrons here, unless you are talking about scattering.
Zz.
A free electron is an electron that is not bound to any specific atom or molecule and is therefore able to move freely within a material or space.
A bound electron is an electron that is attached to a specific atom or molecule and is not able to move freely. It is also sometimes referred to as a valence electron.
Electrons can become free through a process called ionization, where they gain enough energy to break away from the atom or molecule that they were previously bound to.
Yes, free electrons can be found in all materials, although the abundance and mobility of free electrons may vary depending on the material's composition and properties.
Free electrons play a crucial role in electrical conductivity, as they are responsible for carrying electric charge through materials. Materials with a high number of free electrons, such as metals, are good conductors of electricity.