‘mho’ is the unit of ______ of a substance.

conductance

The correct answer is option 3. conductance.

'mho' (written as \(\Omega ^{-1}\)) is the unit of: Conductance.

Conductance is the measure of the ease with which an electric current passes through a substance. It is the reciprocal of resistance. The unit of conductance is the siemens (S), which was formerly represented by the symbol 'mho' (ohm spelled backward). So, 'mho' is the unit of conductance. Conductance is directly related to conductivity, which is a material property representing its ability to conduct electricity. Conductivity is measured in siemens per meter (S/m).