Use the link on the left to access our cable sizing application. Manage and size all your cables, from low voltage to 33 kV.
Electrical resistivity, also known as specific electrical resistance or simply resistivity, is a property of a material that measures how strongly it opposes the flow of electrical current. It is the inverse of electrical conductivity, which measures a material's ability to conduct electrical current.
Electrical resistivity is defined as the resistance of a material per unit length and per unit area, measured in ohm-meters (Ω⋅m). It is denoted by the symbol ρ and is determined by the following formula:
R is the electrical resistance of the material in ohms
A is the cross-sectional area of the material in square meters
L is the length of the material in meters.
In other words, electrical resistivity measures how difficult it is for electrical current to flow through a material. Materials with high resistivity have low conductivity, and materials with low resistivity have high conductivity.
Several factors affect the electrical resistivity of a material, including:
Electrical resistivity is an essential property in a wide range of applications, including:
In summary, electrical resistivity is an important property that measures how strongly a material opposes the flow of electrical current. It is affected by temperature, composition, and microstructure factors and has critical applications in fields such as electrical wiring, heating elements, sensors, and resistors. Understanding electrical resistivity is essential for engineers and scientists working in various fields and is key to developing new materials and technologies.