Two concentric spherical shells fo radill R and 2R are given charges `Q_(1) and Q_(2)` respectively.
The surfaces charge densities of the outer surfaces are equal. Determine the ratio `Q_(1) : Q_(2)`.

Two concentric metallic spherical shell of radii R and 2R are given charges Q_(1) & Q_(2) respectively. The surface charge density on the outer surfaces of the shells are equal. Determine the ratio Q_(1)=Q_(2)

Two concentric conducting shells of radii R and 2R are having charges Q and -2Q respectively.In a region r

Three concentric metallic spherical shells of radii R, 2R, 3R are given charges Q_(1) Q_(2) Q_(3) , respectively. It is found that the surface charge densities on the outer surface of the shells are equal. Then, the ratio of the charges given to the shells Q_(1) : Q_(2) : Q_(3) is

Three concentric metallic spherical shells of radii R, 2R, 3R are given charges Q_(1) Q_(2) Q_(3) , respectively. It is found that the surface charge densities on the outer surface of the shells are equal. Then, the ratio of the charges given to the shells Q_(1) : Q_(2) : Q_(3) is

Three concentric metallic spherical shells of radii R, 2R, 3R, are given charges Q_1 , Q_2 , Q_3 , respectively. It is found that the surface charge denisties on the outer surfaces of the shells are equal. Then, the ratio of the charges given to the shells, Q_1:Q_2:Q_3 , is

Three concentric metallic spherical shells of radii R, 2R, 3R, are given charges Q_1 , Q_2 , Q_3 , respectively. It is found that the surface charge denisties on the outer surfaces of the shells are equal. Then, the ratio of the charges given to the shells, Q_1:Q_2:Q_3 , is

Two concentric spheres of raddi R and r have positive charges q_(1) and q_(2) with equal surface charge densities. What is the electric potential at their common centre?