Capacitor charging:
\begin{equation} Q = Q_0 (1-e^{-\frac{t}{RC}}) \end{equation}
where \(Q\) is capacitor change at time \(t\), and \(Q_0\) initial change, and \(RC\) the resistance and capacitance.
Where, \(RC\) is called the “time constant”.
\begin{equation} I = \frac{V}{R} (e^{-\frac{t}{RC}}) \end{equation}
Note! these are inverse relationships: as a capacitor CHARGE, the current DROPS.