Resistivity

Resistivity

### Formula

$$R=\rho\frac{L}{A}$$

### Rearranged Form

$$\rho=\frac{RA}{L}$$

### Terminologies

- ρ → Resistivity.

- L → Length of conductor.

- A → Area of cross-section.

### SI Unit

$$\Omega m$$

### Dimensions

$$[\rho]=[ML^3T^{-3}A^{-2}]$$

### Conditions / Special Cases

- Resistivity depends on material and temperature.

### Usage

- Used to compare conducting materials.