An insulated metallic vessel full of water is charged with a potential of 3V. Drops of water are tricking from an arifice at the bottem of the vessel. What is the amount of charge contained in each spherical drop of radius 1mm?

Explanation

Potential of the metal vessel full of water, V 3V
Radius of a water drop, R = 1mm = `10^(-3)`m
Capacitance of the water drop,
`C = 4 pi in_0 R= (10^(-3))/(9xx10^(9))= (1)/(9)xx10^(-12) F`
Charge of each water drop,
`Q= CV = (1)/(9)xx 10^(-12)xx3 = 3.3 xx 10^(-13)C`.