`64` globules of mercury each of radius. r and carrying q coalesce to form a big globule.Find the ratio between surface charge density of the big globule `sigma_(1)` and surface charge density of the small globule `sigma_(2)`. `(sigma_(1))/(sigma_(2))` ?

64 small drops of mercury each of radius r and charge q coalesce to form a big drop. The ratio of the surface density of charge of each small drop withh that of big drop is

Two charged spherical conductors of radius R_1 and R_2 are connected by a wire. Then the ratio of surface charge densities of the spheres (sigma_1)/(sigma_2) is

A sphere has surface charge density sigma . It is surrounded by a spherical shell. The surface charge density on the spherical shell is

Surface charge density of soap bubble of radius r and surface tension T is sigma .If P is excess pressure the value of sigma is

The electric intensity at a point near a charged conductor of surface charge density sigma is

Find the electric force experienced by a charge reduced to a unit area of an arbitary conductor if the surface density of the charge equals sigma .

Two spherical conductors of radii 4 m and 5 m are charged to the same potential. If sigma_(1) and sigma_(2) be the respective value of the surface density of charge on the two conductors, then the ratio (sigma_(1))/(sigma_(2)) is

For the hemisphere of radius R shown in the figure the surface charge density sigma varies with theta (shown in figure) as sigma=sigma_(0) costheta the total charge on the sphere is

When a charge of amount Q is given to an isolated metal plate X of surface area A, its surface charge density becomes sigma_(1) . When an isolated identical plate Y is brought close to X the surface charge density on X becomes sigma_(2) . When Y is earthed the surface charge density on X becomes sigma_(3) . Choose the incorrect option.