27 indentical charged water drops each of radius 5 mm and charged to 5 volts combine to form a larger drop while falling freely due to collision of two floating charged clouds. Find the radius

27 indentical charged water drops each of radius 5 mm and charged to 5 volts combine to form a larger drop while falling freely due to collision of two floating charged clouds. Find the potential of the lager drop.

n small drops of mercury each of same size are charged to V volts. The mercury drops coalesce to form a single large drop. The potential of the new drop is

125 charged droplets of mercury coalesce to form a large mercury drop of 10 volts. The potential of each of the small droplets in volts is

N identical oil drops each of capacity C_1 are charged to potential V_1 . Each drop has radius R_1 and have charge Q_1 . All the N-drops coalesce to form a larger drop of radius R_2 charge Q_2 potential V_2 and capacity C_2 . Then (V_2/V_1) and (C_2/C_1) are respectively given as