Conductance and Conductivity

Electrical Conductance:

Electrical Conductance is just the opposite of resistance while resistance is the measure of the opposition of flow of electrons through it by a material. The  Electrical Conductance is the measure of property of a material by which it allows the electrons or electricity to pass through it. In other words Conductance is the measure of inducement which it offers to flow Electricity through it.

The more the conductance of a material is the more current passes through the material when same Potential or voltage is applied to it’s terminals.

Formula of Electrical Conductance:

By formula Conductance is the opposite of resistance and is denoted by “G”

or , G = \dfrac{1}{R}

Or, G = \dfrac{I}{V}

And , Also R = \rho \times \dfrac{L}{A} where , L = Length of the Resistor , A = cross sectional area of resistor and \rho = Specific resistance of the material.

So , G = \dfrac{1}{\rho} \times \dfrac{A}{L}

Unit of Electrical Conductance

The unit of Conductance is “Siemens” and 1 siemens = \dfrac{1}{\Omega}

Electrical Conductivity or Specific Conductivity:

By definition electrical conductivity is the conductivity offered by a cubic meter of a substance and it is the opposite of resistivity an by formula reverse of resistivity.

In the formula for conductance above:  G = \dfrac{1}{\rho} \times \dfrac{A}{L}

The quantity: \dfrac{1}{\rho} is the electrical conductivity of a material.

And is denoted by the Greek letter Sigma ( \sigma )

And  \sigma = \dfrac{1}{\rho}