what's conductivity?

Answer 1

(m)

Electrical conductivity is a measure of a material's ability to conduct an electric current. When an electrical potential difference is placed across a conductor, its movable charges flow, giving rise to an electric current. The conductivity σ is defined as the ratio of the current density to the electric field strength :

. It is also possible to have materials in which the conductivity is anisotropic, in which case σ is a 3×3 matrix (or more technically a rank-2 tensor) which is generally symmetric.
Conductivity is the reciprocal (inverse) of electrical resistivity, and has the SI units of siemens per metre (S·m-1). It is commonly represented by the Greek letter σ, but κ or γ are also occasionally used.

Answer 2

Hi.

Electrical conductivity is a measure of a material's ability to conduct an electric current. When an electrical potential difference is placed across a conductor, its movable charges flow, giving rise to an electric current. The conductivity σ is defined as the ratio of the current density to the electric field strength.

It is also possible to have materials in which the conductivity is anisotropic, in which case σ is a 3×3 matrix (or more technically a rank-2 tensor) which is generally symmetric.

Conductivity is the reciprocal (inverse) of electrical resistivity, and has the SI units of siemens per metre (S·m-1). It is commonly represented by the Greek letter σ, but κ or γ are also occasionally used.

Classification of materials by conductivity

* A conductor such as a metal has high conductivity.
* An insulator like glass or a vacuum has low conductivity.
* The conductivity of a semiconductor is generally intermediate, but varies widely under different conditions, such as exposure of the material to electric fields or specific frequencies of light.

I hope this helps you.

Answer 3

Conductivity can be defined simply by Ohms Law.

V= IR

Where R is the resistance, I the current and V the voltage present in the material. Thus from this relationship conductivity is found The conductivity depends on the number of charge carriers (number of electrons) in the material and their mobility. For example in a metal it is assumed that all the outer electrons are free to carry charge and the impedance to flow of charge is mainly due to the electrons "bumping" in to each other. Thus for metals as temperature is increased the resistance in the material increases as the electrons bump in to each other more as they are moving faster.

Answer 4

Electrical conductivity is a measure of a material's ability to conduct an electric current. When an electrical potential difference is placed across a conductor, its movable charges flow, giving rise to an electric current. The conductivity σ is defined as the ratio of the current density \mathbf{J} to the electric field strength

Answer 5

The ability of a matter to conduct electrical current

Answer 6

Conductivity is the ability to transmit energy. For example, metals possesses a high conductivity of heat and electricity. The word also means the ability of tissue to transmit nerve impulses in a biological sense.

Answer 7

Conductivity is the ability of the material to accept the passage or flow of the electrons through the material .If the resistance to the electrons increase conductivity decreases ie,the material resists the flow of electrons.

Answer 8

Conductivity (or specific conductance) of an electrolyte solution is a measure of its ability to conduct electricity. The SI unit of conductivity is siemens per meter (S/m).

Conductivity measurements are used routinely in many industrial and environmental applications as a fast, inexpensive and reliable way of measuring the ionic content in a solution.For example, the measurement of product conductivity is a typical way to monitor and continuously trend the performance of water purification systems.

Answer 9

When an element / compound allows a flow of electrons through it when a potential is applied across it ; then this property of that material is called conductivity

Answer 10

conductive -

A measure of the ability of a solution to carry electricity; the reciprocal of the electrical resistance. The unit of conductance is the ohm (reciprocal ohm).