Question

The dimensional of resistivity in terms of M,L,T and Q.Q stand for dimensions of charge

Answer 1

F = 1 / 4π∈ × q1q2 / r^2

⇒ ∈ = 1 / 4πF × q1q2 / r^2

The dimension of F,q1 ,q2 and r are MLT^-2 , AT,AT and L respectively.

⇒ The dimension of ∈ are (AT)^2 / MLT^-2L^2 = M^-1 L^-3 T^4 A^2

Where M,L,T and A are the dimensions of mass,length and time and current respectively.

U GOT IT!