Electrical Resistance

Electrical Resistance

The Electrical Resistance The electrical resistance is a measurement of the opposition that offers a material to the passage of electrons (the electric current). When a material, such as metals has many free electrons, it allows the easy flow of electrons and it is called conductor. For example: copper, aluminum, silver, gold, etc.. If the material has few […]

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Electrical Resistivity or Specific Resistance

Electrical Resistivity or Specific Resistance

Electrical Resistivity The electrical resistivity [ρ] (rho)  is a characteristic of a material. Its unit is the ohm meter. It indicates how strongly this material opposes to the flow of electric current. It is defined as: ρ = R * A/L, where: ρ  is the resistivity with ohm meter units R  is the electrical resistance in ohms L  is the length […]

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