In physics and electrical engineering, a conductor is an object or type of material that allows the flow of charge (electrical current) in one or more directions. Materials made of metal are common electrical conductors. Electrical current is generated by the flow of negatively charged electrons, positively charged holes, and positive or negative ions in some cases.
In order for current to flow within a closed electrical circuit, it is not necessary for one charged particle to travel from the component producing the current (the current source) to those consuming it (the loads). Instead, the charged particle simply needs to nudge its neighbor a finite amount, who will nudge its neighbor, and on and on until a particle is nudged into the consumer, thus powering it. Essentially what is occurring is a long chain of momentum transfer between mobile charge carriers; the Drude model of conduction describes this process more rigorously. This momentum transfer model makes metal an ideal choice for a conductor; metals, characteristically, possess a delocalized sea of electrons which gives the electrons enough mobility to collide and thus affect a momentum transfer.
As discussed above, electrons are the primary mover in metals; however, other devices such as the cationic electrolyte(s) of a battery, or the mobile protons of the proton conductor of a fuel cell rely on positive charge carriers. Insulators are non-conducting materials with few mobile charges that support only insignificant electric currents.
I have a question about the surface charge and the potential. My physics book states that the potential inside the conductor is the same at the surface. But the potential is just the electric field times the radial distance. Does this mean that it is possible to determine the electric field at a...
If a charge q was placed inside a cavity inside a metal shell, then inside this shell would there be any electric field??
And since Gauss law says that this metal surface would have an induced charge then a point within the regoin between the cavity and the outer surface of this shell thn...
Hello,
Previously, I asked about a single charge inside a solid metal sphere. And I said that it would not be possible to represent the charge at the surface, because there is no driving force to cause migration. I talked with a professor and he told me that in that case it is called...
how does the potential of the conductor decreases when it is charged by a charged body that means if the negative charges are attracted or repeled due to nearby charged body the potential decreases .how is that
I am passing Xamps thru a Ylenth of conductor for time t sec. can anybody suggest me how to calculate temperarure rise in the conductor after time tsec in a conductor
Good conductor Of Electricity
Can anyone help me by answeing the following question :-
"Please name a Solid which is good condcutor of Electricity, but is a non-conductor or at least a bad conductor of heat? and is easily available."
In the context of the above question I may add that...
Greetings !
I was wondering how (or if) a superconducor can be
connected to a "normal" conductor in an electric
circuit ? I guess the conductor-superconductor connection
is easy, but how do you avoid problems at the reverse
connection - do you need some amplifier or something.
Also...
Please read this topic first.
I have recently seen a proof (using Gauss' law) showing that there is no electrical field inside a charged metallic conductor (due to the carge on its surface). (i can provide this proof if needed)
If that proof was right, then this must mean that the inner sphere...
I'm revising for my exam and got stuck in the following questions. Please help.
1) An isolated spherical conductor of radius r is charged to a potential V. The total electrical energy stored is _______.
This is an MC question and the answer is V2(2*pi*εo*r)
I only know energy stored...