Electrical resistivity, also known as specific electrical resistance, is a property of a material that determines its ability to oppose the flow of an electric current. It is measured in Ohm-meters (Ω•m) and is the reciprocal of electrical conductivity. High resistivity materials are poor conductors of electricity, while low resistivity materials are good conductors. The electrical resistivity of a material is affected by its temperature, pressure, and the presence of impurities. It plays a crucial role in determining the efficiency of electrical devices and the performance of electrical circuits. The electrical resistivity of a material can be measured using a variety of techniques, including the four-point probe method and the Van der Pauw method.

The formula for determining the electrical resistivity is defined as:

\(\rho\) \(=\) \(\dfrac{R \cdot A}{L}\)

\(\rho\): the resistivity

\(R\): the resistance of the material

\(A\): the cross sectional area of the material

\(L\): the length of the material

The SI unit of electrical resistivity is: \(ohm \cdot meter\)

Use this calculator to find the resistivity of a uniform material when the resistance, the length and the cross sectional area of the material are given.

the resistance of the material

\(R\)

\(ohm\)

the cross sectional area of the material

\(A\)

\(meter^2\)

the length of the material

\(L\)

\(meter\)