Case I- represents two concentric spheres of inner radius a and outer radius `b`. The volume between two sphere is filled with a material of electric conductivity `sigma` dielectric constant `k`.
Case II -represents two coaxial long cylindrical shells of inner radius a and outer radius `b`, each having length `l(lgt gt a,b)`. The volume between two cylindrical shells is filled with a material of electrical conductivity `sigma` and dielectric constant `k`.

Mark the CORRECT statement(s)

Options

A. The resistance between the two spheres in case I is `1/(4pi sigma)[1/a-1/b]`.
B. The capacitance between the two spheres in case I is `(4pi epsilon_(0))/([1/a-1/b])`
C. The resistance between the two cylinders in case II is `1/(2pi sigma l)ln(b/a)`
D. The capacitance between the two cylinders in case II is `(pi epsilon_(0)l)/(ln(b/a))`