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scientist91
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Thank you.
And why there can't be electric current created without closed circular loop?Archduke said:What do you mean by what makes the current? Do you mean what is electric current? It's the movement of electrons in the conductor. A quick look on http://en.wikipedia.org/wiki/Current_(electricity)" tells you that. First line. To be fair, it does seem that you're asking a lot of questions which could be easily answered by a quick visit to Wiki, or looking it up in a book.
As an afterthought, perhaps you meant why do the electrons move? It's because of the electric potential difference set up by the battery/cell/whatever, and so the electrons are attracted to the positive side of the battery.
Caution, though, conventional current flow is defined in the opposite direction as the flow of the electrons.
And what is the roll of the magnetic and electric field?Archduke said:Because then there would just be a build up on the end of the wire. Having a closed loop means the current can flow continuously. The electrons are attracted to the positive side of the battery, and then, once they have gone through the battery, the electrons are then push (similar charges repel) the electrons back round the closed loop again. (This is probably a very simplistic view, and it'll get picked to pieces, I'm sure; but it works for me to help visualise it)
Remember, current is the rate of flow of charge per unit time, so for a current to be maintained, the electrons need to be constantly moving - which can only be achieved by a closed loop (since there are only a finite amount of electrons in the wire).
scientist91 said:And what is the roll of the magnetic and electric field?
But that's a rough idea, yes.and are the electrons jumping from atom to atom in coductor with electric current inside?
The electric field is a physical quantity that describes the influence of electric charges on other charges or objects. It is a vector field, meaning it has both magnitude and direction, and is created by the presence of electric charges.
The electric field can exert a force on electrons, causing them to move in a particular direction. This movement of electrons is what creates an electric current.
The strength of the electric field around electrons is determined by the magnitude and distribution of electric charges, as well as the distance between the charges. The closer the charges are, the stronger the electric field will be.
The electric field can vary in different materials depending on their electrical conductivity. Materials with high conductivity, such as metals, have a lower resistance to the flow of electrons and therefore have a higher electric field compared to insulating materials.
Yes, the electric field can be manipulated by changing the placement or amount of electric charges. This is the basis for many devices and technologies, such as capacitors, in which the electric field can be controlled to store and release energy.