what is meant by conductivity conductace

The inverse of resistance (R) is called conductance of a conductor.
i.e, Conductance, G = 1/R.
The SI unit of conductance is mho or siemen (S)
The inverse of resistivity (ρ)  of a conductor is called its electrical conductivity (σ) .
i..e, σ = 1/ρ
​The SI unit of electrical conductivity is mho m-1 or Sm-1
 

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