Assume that a drop of mercury is an isolated sphere What is

Assume that a drop of mercury is an isolated sphere. What is the capacitance of a drop that results when two drops each of radius R = 3.64 mm merge?

Solution

C = 4 . . e0 . r

r = 2 . R = 1.259 * (3.64 . 10^–3) = 4.586 . 10^-3 m

C = 4 * (8.854 . 10^–12) * (4.586 . 10^–3)

= 0.510pF