Suppose there is a cylindrical shell with inner radius 'a' and outer radius 'b' inner surface is at potential V0 and outer surface is grounded. The area between inner and outer surface is filled with two dielectric materials (σ1,?1 for 0< Φ<2π/3 and σ2,?2 for 2π/3< Φ<2π ). If length of shell is L . Calculate Resistance per unit length using total power dissipation and power dissipation density.