Question

Dimension of Specific Resistance?

Answer 1

Dimension of specific resistance `rho` is `ML^3T^(-1)Q^(-2)`

Explanation:

The formula relating specific resistance `rho` of a conductor to its resistance `r` is

`r=rhol/A`, where `A` is area of cross-section.of conductor and `l` is its length

i.e. `rho=(Ar)/l`

As dimension of `r` are `ML^2T^(-1)Q^(-2)`

Therefore dimension of `rho` is `ML^2T^(-1)Q^(-2)xxL^2/L`

= `ML^3T^(-1)Q^(-2)`