resistivity

- noun a measure of the electrical resistance of a material of a standard length and cross-section.

- Its
__symbol__is r, or ρ. A measure of the inherent ability of a material to__resist__the flow of current. It is the__reciprocal__of electrical conductivity, and depending on their resistivities, materials can be classified as insulators, semiconductors, or conductors. The lower the resistivity, the better conductor a material is. Its formula is: r =, where r is resistivity in ohm-meters,*RA/L*is the resistance in ohms,*R*is the cross-sectional area of the material in*A*__square__meters, andis its length in meters. Also called*L*__electric__resistivity, or specific resistance. - abbreviation rho (ρ)
- symbol r
- symbol for
__volume charge density__, or__charge density__(2).

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