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Old 06-29-2006   #2 (permalink)
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sanctus
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Re: Electric fields and currents

Quote:
Originally Posted by beenuseren

The electric force that exists between the negative charge and the positive charge, is that force responsible for the motion of electron which constitute current?
Yes, but sometimes it can be a bit more complicated (see superconduction, but eventually even that comes down to electromagnetic forces). But this electric force you describe I would call it the electric field. The force is the charge times the field, but if your charges are hold in place you can "see" no force but the field yes.
Quote:
Originally Posted by beenuseren
If so, there are force field lines which have certain shape and also they show the direction of force.
Actualy, if you consider an electron in that field then it shows you the opposite direction of the force F=qE. and for the electron q<0.

Quote:
Originally Posted by beenuseren
Does the free electron takes the path depicted by the field line which is directed from negative plate of the battery to the positive plate?
Why should it go anywhere else if there are no other forces/fields?

Quote:
Originally Posted by beenuseren
IF that is right how is it correct? Because free electrons are present in the conductor wire and the wire can have many twists and turns.
Those materials who are good conductors have valence electrons which are not attached to the nuclei so there are some "free electrons" as you said; but those electrons are confined to rest in the conductor (ie. not attached strongly to a nucleus but attached to "the material"), so the twists are no problem.

Quote:
Originally Posted by beenuseren
At the end of it the main important thing is, Does the free electron takes the path depicted by the field line which is directed from negative plate of the battery to the positive plate?
Again, why should it not, but I'm no more sure if the field direction goes from"+" to "-" or the other way around.

Quote:
Originally Posted by beenuseren
kindly provide me correct theory.
I think it is correct, but ?

And by the way welcome to the forums.


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