how circuit works in a electron's or hole's world?

[suifengpiaoyang]

we'v learned a lot on how a circuit works in a LPM system,and some may also have learned how the BJT works in the carriers' world. But what confused me is how the circuit works in the carriers' perspective.

Say how does the electron transfer in the metal line,and how when it comes to a resistor 、capacitor、inductor, also how in the battery or power system?
Does the power system supply electrons and holes for circuit?

I can only imagine that the electron transfer in the metal line because of the electric field along the metal line

 

[Prashanth.vinnakota]

Battery or power supply just provides the potential difference which enables the carrier flow/current flow between its terminals.

So what ever component you take there will be electron flow but we usually talk about current flow and its direction. Anyhow Both are imaginary.

Also keep in view of the most important linearity law namely Ohm's law. Relationship between current and voltage is a non-linear function for semiconductor components like diode, transistor etc.

 

[suifengpiaoyang]

"Battery or power supply just provides the potential difference which enables the carrier flow/current flow between its terminals."

thanks!
I seem to get it a little, is that means the electron will not disappear,but flow between its terminals?

 

[Ratch]

suifengpiaoyang,

we'v learned a lot on how a circuit works in a LPM system,

What's LPM? It would help if you wrote out the complete definition of the acronym the first time before you use it.

Holes can only exist is semiconductors where electrons are relatively scarce. There is such an abundance of electrons in wires that a hole would immediately get filled and neutralized.

Charges are moved by voltage. Voltage is the energy density of the charge. It takes energy to crowd a lot of electrons together. The more electrons are together, the higher the energy density (voltage) of the charges (electrons). If you pack the same number of electrons together more tightly, that will also raise the energy density of the charge. Every electron has the same negative charge, so it is repelled by its neighbor. This causes electrons to move to where the energy density is lower. The movement of electrons means a current exists from a higher voltage to a lower voltage.

The number of electrons in a metallic conductor is exceedingly great. Electrons travel through a wire very, very slowly (drift velocity). The electron that enters one end of the wire is not the same electron that exits at the other end of the wire. The tlime between the exiting and entering electron is very fast. A good analogy is marbles through a hose. Every time you put a marble in one end of the hose, almost immediately a marble pops out the other end. However the actual travel of any marble in the hose if very slow.

Ratch

 

[bbulutlu]

these are the droids you're looking for
**broken link removed**

 

[suifengpiaoyang]

thank u very much !

 

[ElectronicsRookie]

voltage is like a pressure
current is like a water flow
wire is like a pipe.
normally when analyzing the circuit, current flow should be considered. However in practice hole flow is used by majority to view circuit.

 

[Ratch]

ElectronicsRookie,

voltage is like a pressure

Voltage is the energy density of the charge. Does that sound like newtons/square meter to you?

current is like a water flow

Does current get you wet?

wire is like a pipe.

Is a wire hollow?

normally when analyzing the circuit, current flow should be considered.

Current flow? Current flow means charge flow flow. Current does not flow twice. You should say "charge flow", and leave it at that.

However in practice hole flow is used by majority to view circuit.

Holes only exist in semiconductors. Conduction in metals is by electrons.

Ratch