Two satellites of radii `r_(1)` and `r_(2)` are made from the same material.The ratio of acceleration due to gravities at the surface of the two satellites is
(A) `(r_(1))/(r_(2))`
(B) `(r_(2))/(r_(1))`
(C) `(r_(1)^(2))/(r_(2)^(2))`

Two planets of radii r_1 and r_2 are made from the same material. The ratio of the acceleration of gravity g_1//g_2 at the surfaces of the planets is

Two planets have radii r_(1) and r_(2) and densities d_(1) and d_(2) respectively. Then the ratio of acceleration due to gravity on them is

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 spheres of radii R_(1) and R_(2) are made of the same material and are at the same temperature. The ratio of their thermal capacities is:

Two planets have radii r_(1) and 2r_(1) and densities are rho_(1) and 4rho_(1) respectively. The ratio of their acceleration due to gravities is

Two conducting spheres of radii r_(1) and r_(2) are charged to the same surface charge density . The ratio of electric field near their surface is

If two planets of radii R_(1) and R_(2) have densities d_(1) and d_(2) , then the ratio of their respective acceleration due to gravity is

Two conducting spheres of radii r_(1) and r_(2) are equally charged. The ratio of their potentral is-

Two charged spheres of radii R_(1) and R_(2) having equal surface charge density. The ratio of their potential is

Two circles of radii r_(1) and r_(2)(r_(1)>r_(2)) touch each other exterally.Then the radius of circle which touches both of them externally and also their direct common tangent is (A) ( sqrtr_(1)+sqrt(r)_(2))^(2) (B) sqrt(r_(1)r_(2))(C)(r_(1)+r_(2))/(2) (D) (r_(1)-r_(2))/(2)