Aha! RC circuits have their own equation:azboy1910 wrote: ↑September 16th, 2020, 7:43 amCreationist127 wrote: ↑September 16th, 2020, 5:37 am1. a. is right, but I got .0029 s and .017s for b., and I was looking for infinite time or something similar for c., as in an ideal system the capacitor will only approach, and never reach, fully charged.

2 is right, 3. a. and b. are right. 3. c. the numbers are right, but I've always seen that no fourth band means a tolerance of 20%.

Which one of us did 1. b. and c. wrong?Ok, so this is how I came up with my answers for 1b. 1b. 1 V/(63.2% x 9 V) x 0.025 s = 0.0044 s, 4.5 V/(63.2% x 9 V) x 0.025 s = 0.0198 s This is most likely wrong, but this is just how I got my answers. 1c. I think you are right for this one because capacitors never really accomplish being fully charged as you said, although very close.

In this case, you plug in 1 or 4.5 for Vt, 9 for Vmax, and .025 for R*C, and solve for t, where (if I did it right) you should get .0029 and .017, respectively. Good try, though! Your turn.

EDIT: Just out of curiosity, where did the 63.2% come from?