# resistivity

## Definitions

### General Science

### Cars & Driving

- noun the ability of a material not to conduct electricity.

### Electronics

- 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 = *RA/L*, where r is resistivity in ohm-meters, *R* is the resistance in ohms, *A* is the cross-sectional area of the material in __square__ meters, and *L* is its length in meters. Also called electric resistivity, or __specific resistance__. - abbreviationrho (ρ)
- symbolr
- symbol for
__volume charge density__, or charge density (2).

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