Two concentric spheres of radii `R` and `2R` are charged. The inner sphere has a charge if `1muC` and the outer sphere has a charge of `2muC` of the same sigh. The potential is `9000 V` at a distance `3R` from the common centre. The value of R is

Two uniformly charged concentric hollow spheres of radii R and 2 R are charged. The inner sphere has a charge of 1 muC and the outer sphere has a charge of 2 mu C of the same sign. The potential is 9000 V at a point P at a distance 3R from the common centre O. What is the value of R ?

two metal spheres of radii R_(1) and R_(2) are charged to the same potential. The ratio of charges on the spheres is

Two concentric spheres of radii R and r have similar charges with equal surface charge densities (sigma) . The electric potential at their common centre is

Consider two concentric spherical metal shells of radii r_1 and r_2 (r_2 gt r_1) . If the outer shell has a charge q and the inner one is grounded, the charge on the inner shell is

Two connectric spheres of radii R and r have similar charges with equal surface charge densities (sigam) . The electric potential at their common centre is

Two connectric spheres of radii R and r have similar charges with equal surface charge densities (sigam) . The electric potential at their common centre is

Two concentric conducting spheres of radii R and 3R carrying charges Q and 2Q respectively.If the charge on inner sphere is doubled.The potential difference between inner and outer spheres will..?

Two concentric hollow conducting spheres of radius r and R are shown. The charge on outer shell is Q. what charge should be given to inner sphere so that the potential at any point P outside the outer sphere is zero ?