1. The problem statement, all variables and given/known data A 50 [tex]\mu[/tex]F capacitor is being charged from a 6V battery via a 100k[tex]\Omega[/tex] resistor . what is the initial charging current? after a period of time, the charging current is 30[tex]\mu[/tex]A. what are the pd's across the resistor and the capacitor at that moment? how much charge has been stored on the capacitor up to that time? 2. Relevant equations Q = CV Initial Charging Current = emf/resistance Q = EC (1 - e-t/RC) 3. The attempt at a solution the initial charging current wasnt a problem, using V=IR. I0 = 60[tex]\mu[/tex]A from there on, i struggled to get the pd's but i realised that one half time had gone seeing as the current had halved so the pd must be 3V on each. i tried using Q = CV to find the charge on the capacitor at that point, but it gave me 1.5 x 10-4C which is not the answer given. i also used the third equation given to get the charge, given the time- but the e term was negative, giving a negative amount of charge. the answer given in the book is 6[tex]\mu[/tex]C, but i can't see how to get this.