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

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 that of the big drop is

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 with that of the big drop is

Two small drops of mercury, each of radius R , coalesce to form a single large drop. The ratio of the total surface energies before and after the change is

27 drops of water, each of radius 3 mm and having equal charge are combined to form a large drop. Find the ratio of the surface density of charge on the large drop to that on each small drop.

Two small drops of mercury each of radius r form a single large drop. The ratio of surface energy before and after this change is