An object is called as a good conductor of electricity when it allows the electrons to flow within it easily ( for example a copper rod). Resistance it the opposition to the flow of electrons through it. Resistance is affected by following factors of any object:
1) More the length more the resistance
2) Less diameter, more the resistance
3) Temperature
Resistance of any object can be lowered by lowering the temperature. The point where the Resistance of any conductor drops close to zero is called superconductivity.
A conductor will allow electricity to pass through it. Resistors block electricity. the best working example of this is a wire. in the core of the wire, there is a type of conductor, usually a metal. on the outside of the wire is rubber, which keeps people who touch it from being shocked.
Good conductors tend to have lots of loosely-attached electrons that can move about, whereas poor conductors (insulators) have electrons bound up in tight bonds. Electrons in excellent conductors such as metals exist almost as a kind of fluid that flows past the atoms themselves.
If we consider a wire of a certain material (a cylinder much longer than larger) and apply a voltage difference between its extremes we have two possibilities:
- no current flows through the wire up to the moment in which the potential is so high that the very structure of the material is broken by the fact that electrons are extracted from the atoms or molecules by the huge electrical field (called dielectric breakdown). Such a material is called dielectric.
- A current flows through the wire without any damage to the material and it linearly increases increasing the applied voltage, up to a voltage so high that saturation starts, after that breakdown happens as in dielectrics.
Such a material is called conductor.
As far as the voltage is not too high, the current I flowing in a conductor wire depends on the applied voltage V through the law (Ohm's law)
V = (L /(A s) ) I
where A and L are respectively the section and the length of the wire and s is teh so called conductivity, that is a material property. Higher the conductivity, better the conductor.
Metals are usually good conductors, the conductivity for a few metals mesured in Internationall System units (S/m) at 20°C is reported below
Silver
6.30×107
Copper
5.96×107
Gold
4.10×107
Aluminium
3.5×107
Calcium
2.98×107
Tungsten
1.79×107
Zinc
1.69×107
Nickel
1.43×107
Lithium
1.08×107
Iron
1.00×107
Platinum
9.43×106
It is interesting to note that on the other side of the conductivity scale, good insulators have a conductivity of the order of the order of 10^-21 (PET) or even 10^-23 (Teflon) so that the range of conductivity of common materials is as large as 30 orders of magnitude.
Good conductors for electricity? Typically good conductors are metals, but any substance that has free-roaming electrons can make for good conductors, whereas substances with fixed, non-sharing electrons often make for poor conductors.
A conductor better allows electricity to pass through it and an insulator prevents electricity from going through it.
The diffrerence between a good condutor and a bad conductor is that a good conductor it go through electricity but a insulator would not attract electricity .
Good conductors of electricity: silver, cooper, aluminum, gold
Poor conductors of electricity: aluminum oxide, porcelain, rubber, wood
electricity! Because it is a non-metal
since iron is a metal and most metals are good conductors of electricity one can assume that iron is a fair conductor of electricity. The electrical conductivity of iron is approx. 1/6 from the electrical conductivity of silver (the best known conductor).
For a metal, it's not bad.
Copper rod is covered by insulating materials, because copper is good conductor of electricity when we touch copper rod we get shock and insulators are bad conductor of electricity hence copper rod is covered by insulating materials
In its most commonly encountered from "white" phsphorus (where there are individual P4 molecules) is not a good conductor. This is also true for the red, and violet allotropic forms, which have a different structure. The black allotropic form has a metallic appearance but is still a poor conductor but is slightly better than the others, one reference describes it as a semiconductor at high temperatures.
zinc is a good conductor of electricity
glass, ceramic,diamond, are somtricitytte of the conductor of hear but bad conductor of electricity meher n sethna
No. Ceramic is a bad conductor of heat and electricity.
Candle is a bad conductor of heat and electricity.
good conductor means your gay
No. Metals are good electrical conductors.
see, the pencil's outer shield is made out of wood which is a bad conductor of electricity but the graphite core is a good conductor. thank you.
A good conductor will conduct more heat, or more electricity, depending on the context, than a bad conductor. That is, it will transfer more of either in any given time period.
of course,we know how lemons conducts electricity in the same way we can also conduct electricity by orange
No, carbon is a good conductor of electricity. Example, the carbon brushes in electric motors. But you might research the conductivity of Diamond and Graphite.
The diffrerence between a good condutor and a bad conductor is that a good conductor it go through electricity but a insulator would not attract electricity .This will help to prevent electricuted.
I believe chlorine would be a bad conductor of electricity. Not sure about the heat. Usually one would want to stick to using a type of metal and stay away from most liquids when trying to conduct electricity.