The dimensional formula for resistivity of conductor is

Options

A. `[M L^(2) T^(-2) A^(-2)]`
B. `[M L^(3) T^(-3) A^(-2)]`
C. `[M L^(-2) T^(-2) A^(2)]`
D. `[M L^(2) T^(-2) A^(-3)]`

Answer

B

Explanation

Resistivity `= ("Resistance" xx "Area")/(" Length")`
`= (ML^(2) T^(-3) A^(-2) xx L^(2))/(L) = [ML^(3)T^(-3)A^(-2)]`