1. The problem statement, all variables and given/known data Dry air has a resistivity of about 3*10^13 Ωm. A capacitor has square plates 10cm on a side separated by 1.2mm of dry air. The capacitor is charged to 250V. Assuming the potential difference does not change as the charge flows, what fraction of the charge will flow across the gap in 1 minute? 2. Relevant equations C = Q/V, ρ = E/J, J = I/A = n*q*v, V = (ρ*L*I)/A 3. The attempt at a solution I found a capacitance using ε, area and plate separation, multiplied this capacitance by voltage and then divided this found charge by the time period - but I strong feeling that I am on the incorrect path altogether.