Conductivity (Electrical)

Electrical Conductivity (σ) is the reciprocal of resistivity (ρ) – where σ and ρ are the Greek letters sigma and rho respectively.

Equation: conductivity (σ) = 1 / resistivity (ρ)

Conductivity is measured in siemens per metre (S/m).

Worked Example 1

Calculate the conductivity of a specimen which has a resistivity of 5 × 10-8 Ω m.
Show / hide answer

σ = 1 / ρ = 1 / (5 × 10-8)

  = 20 × 106 S/m

  = 20 MS/m

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