A solid cylindrical conductor of radius a and charge Q is coaxial with a cylindrical shell of negligible thickness, radius b> a, and charge - Q (Fig.1). Find the capacitance per unit length of two coaxial metal cylindrical tubes of radii a and b, and length L shown in the figure below. (1) 2.76, In (b) 278 (ii) (ii) 2.7c, In(a) (iv) None of the above L

A solid cylindrical conductor of radius a and charge Q is coaxial with a cylindrical shell of negligible thickness, radius b> a, and charge - Q (Fig.1). Find the capacitance per unit length of two coaxial metal cylindrical tubes of radii a and b, and length L shown in the figure below. (1) 2.76, In (b) 278 (ii) (ii) 2.7c, In(a) (iv) None of the above L