Question

find dimensions of resistivity

Answer 1

for what we need to find resistivity dimensions without having values of resistance, length,area
so give the values of R,A and l

Answer 2

Electric resistance=potential difference/current

(PD=work done/charge)

=> work done/charge/current

work done=[ML^2T^-2]

charge=[AT]

current=[A]

=> [ML^2T^-2]/[AT]/[A]

=> [ML^2T^-3A^-2]