The Greek letter "rho" (ρ) is called the resistivity of a material.
Understanding Resistivity (ρ)
Resistivity is a fundamental property of a material that quantifies how strongly it opposes the flow of electric current.
- It represents the resistance of a wire made of that material.
- The wire has a unit length and a unit cross-sectional area.
Units of Resistivity
The unit for resistivity is the ohm-metre (Ω⋅m).
Formula
Resistivity is related to resistance (R), length (L), and cross-sectional area (A) by the following formula:
ρ = (R * A) / L
Where:
- ρ is the resistivity (Ω⋅m)
- R is the resistance (Ω)
- A is the cross-sectional area (m2)
- L is the length (m)
