Please Help! This is based on the time at any point on the curve during exponential decay of voltage. Could someone explain to me this formula? t=T1n(E/Vl) example: t=(7.5ms)1n(20v/14.57v)=2.38ms. I get 20/14.57=1.372683596 (7.5)(1.372683596)=10.29512697 where and how do you get 2.38, where does the 1n fall in and how? is there a numerical value for this statement? Please help?