1. The problem statement, all variables and given/known data Solving the equation: V = V0*[1 - e^(-t/RC)] 2. Relevant equations Need to solve this equation for time to calculate the time at which a charging capacitor achieves a certain voltage across it's plates. 3. The attempt at a solution I solve it as: t = -RC*ln(V/V0) but this doesn't seem to work. Help!