Resistivity Unit

The unit of resistivity is:

Ω·m (Ohm meter)

 Definition:

Resistivity (ρ) measures how strongly a material opposes the flow of electric current.

 Formula:

$$ρ = R \cdot \frac{A}{L}$$

Where:

• $ρ$= resistivity (Ω·m)

• $R$= resistance (Ohms, Ω)

• $A$= cross-sectional area (m²)

• $L$= length of the material (m)

 Fun Facts:

• Low resistivity = good conductor (like copper or silver)

• High resistivity = good insulator (like rubber or glass)

Need a chart of common materials and their resistivity?