Temperature coefficient α per degree C. The electrical resistivity of a metallic conductor decreases gradually as temperature is lowered. In ordinary conductors, such as copper or silver, this decrease is limited by impurities and other defects. Even near absolute zero, a real sample of a normal conductor shows some resistance. In a superconductor, the resistance .
Complex resistivity and. L = 100m, the cross- sectional area of the conductor is 2. That is 6milli-ohms or 0. We said previously that resistivity is the electrical resistance per unit length and per unit of conductor . Electric Conductor Resistance Calculator. This calculator can be used to calculate electrical resistance of a conductor. Resistivity Coefficient (ohm m) ( default value for copper ).
Cross sectional area of the conductor (mm ) – AWG Wire Gauge . When we say that copper is a heavier metal than aluminium, we are comparing their densities. Density and resistivity are both bulk properties of a material. R is the resistance of the conductor in Ohms l is the length of the conductor in meters ρ is the electrical resistivity (also known as the specific electrical resistance) of a conductor.