Space between two concentric conducting spheres of radii and ( ) is filled with a…

PHYSICS · Single correct · A Level · Physics · Electricity · Electricity

Problem

Space between two concentric conducting spheres of radii

a

and

b

(

b > a

) is filled with a medium of resistivity

\rho

. The resistance between the two spheres will be : (1)

\frac{\rho}{4\pi} \left( \frac{1}{a} - \frac{1}{b} \right)

(2)

\frac{\rho}{2\pi} \left( \frac{1}{a} - \frac{1}{b} \right)

(3)

\frac{\rho}{2\pi} \left( \frac{1}{a} + \frac{1}{b} \right)

(4)

\frac{\rho}{4\pi} \left( \frac{1}{a} + \frac{1}{b} \right)