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An Electrical Component or Wire Resistivity Calculator

Formula

To calculate the Resistivity:

$ρ = \frac{R \times A}{L}$

Where:

$ρ$ is the Resistivity (Ω·m)
$R$ is the Resistance (Ω)
$A$ is the Cross-Sectional Area (m²)
$L$ is the Length (m)

What is Resistivity?

Resistivity is a term used in electronics that describes the rate at which a component or wire resists the flow of electrons or electricity. It’s a resistance per unit of distance. So the longer the wire, the lower the resistivity and vice versa.

Example Calculation 1

Let's assume the following values:

Resistance ( $R$ ) = 10 Ω
Cross-Sectional Area ( $A$ ) = 0.001 m²
Length ( $L$ ) = 2 m

Using the formula:

$ρ = \frac{10 \times 0.001}{2} = 0.005 \text{ Ω·m}$

The Resistivity is 0.005 Ω·m.

Example Calculation 2

Let's assume the following values:

Resistance ( $R$ ) = 5 Ω
Cross-Sectional Area ( $A$ ) = 0.002 m²
Length ( $L$ ) = 1 m

Using the formula:

$ρ = \frac{5 \times 0.002}{1} = 0.01 \text{ Ω·m}$

The Resistivity is 0.01 Ω·m.