SI Unit of resistivity is ohm meter.



We know that,

R = ρ (l/A)


ρ = R (A/l)

= ohm × m 2 /m

= ohm × m


Therefore, unit of rho is ohm meter.


Note: Unit of R is ohm, Unit of area of cross-section is m 2 , unit of length is m


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CA Maninder Singh is a Chartered Accountant for the past 14 years and a teacher from the past 18 years. He teaches Science, Economics, Accounting and English at Teachoo