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# Electrical Resistivity Calculator

Last updated: Monday, May 01, 2023
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Electrical Resistivity
Wire Resistance

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: $$ohm \cdot meter$$

## Find $$\rho$$

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
$$L$$
$$meter$$

5 (7)
4 (12)
3 (5)
2 (4)
4 (6)