Question

What is the reciprocal of resistivity of a material called? Give its unit.

(a) Conductance, ohm^-1

(b) Conductivity, ohm^-1 m^-1

(c) Conductance, ohm^-1 m^-1

(d) Conductivity, ohm^-1

I have been asked this question in homework.

Query is from Ohm’s Law topic in portion Current Electricity of Physics – Class 12

Answer 1

Right choice is (b) Conductivity, ohm^-1 m^-1

The best explanation: Conductivity = \(\frac {1}{Resistivity}\)

SI unit of conductivity = \(\frac {1}{ohm \, meter}\)

= ohm^-1 m^-1.