When using a constant current to charge the capacitor, the charging voltage on the capacitor will follow the equation:
If we know the input in terms of number of electrons, we can use the equation to calculate the current:
Number of electrons ( N ) = ( I x t ) / e
I is the reading of ammeter.
t is the amount of time the current flows.
e is the charge of one electron.
e = 1.6 x 10 ^ ( -19 )