1. The problem statement, all variables and given/known data A circuit is constructed with four resistors, one capacitor, one battery and a switch as shown. The values for the resistors are: R1 = R2 = 37 Ω, R3 = 90 Ω and R4 = 105 Ω. The capacitance is C = 49 μF and the battery voltage is V = 12 V. The positive terminal of the battery is indicated with a + sign. What is Q(∞), the charge on the capacitor after the switch has been closed for a very long time? 2. Relevant equations V = Q/C V= IR 3. The attempt at a solution V = (R1 +R4)I + R3I3 R3I3 + Q/C = R2IC I3 + IC = I I have 4 unknowns and 3 equations. :( I think I might be missing something fundamentally about capacitors though.