Question

Formula of relation between resistance cross-sectional area

Answer 1

If area of cross-section is pi*r^2,

Resistance is R

Relation is :-

                          R∝ 1/pi*r^2

                         

                       R=k/pi*r^2                         { where k is constant,when we remove proportionality sign,a constant comes}

 

                       or        k=R*pi*r^2