Siemens is the S.I unit of Conductance.

The unit of conductance is called the siemens (symbol: S), named after the German inventor and industrialist Ernst Werner von Siemens. Conductance is a measure of how easily electric current flows through a material or a circuit. It is the reciprocal of resistance, which is the measure of how much a material or a circuit opposes the flow of electric current. In other words, conductance measures the ease with which electric current flows through a conductor.

Explanation:

1. Conductance:
Conductance is a measure of the ability of a material or a circuit to conduct electric current. It is the opposite of resistance and is defined as the ratio of the electric current passing through a conductor to the voltage across the conductor.

2. Resistance:
Resistance is a measure of the opposition to the flow of electric current. It is the property of a material or a circuit that resists the flow of electric current. Resistance is measured in ohms (Ω), and it determines how much voltage is required to drive a given amount of current through a circuit.

3. Relationship between Conductance and Resistance:
Conductance is the reciprocal of resistance. Mathematically, conductance (G) is equal to 1 divided by resistance (R). This can be represented as follows:
G = 1/R

4. SI Unit of Conductance:
The SI unit of conductance is the siemens (S), named after Ernst Werner von Siemens. One siemens is equal to one ampere per volt (A/V) or one reciprocal ohm (Ω⁻¹). It is the unit of measurement for the ease with which electric current flows through a material or a circuit.

Conclusion:
Siemens is the SI unit of conductance, which is the measure of the ease with which electric current flows through a material or a circuit. It is the reciprocal of resistance and is named after Ernst Werner von Siemens, a German inventor and industrialist.