1. The problem statement, all variables and given/known data For the RC Circuit (R = 1M Ohm, C = 1 Micro Farad and E = 30 V) find the potential difference across the resistor 10 sec after the switch is closed. 2. Relevant equations V = E (1 - e^ -t/RC) 3. The attempt at a solution I use the above equation but I get it wrong (it should be 4V) I think I might be putting in something wrong.