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March 4, 2015

March 4, 2015

Posted by **Katie** on Sunday, May 22, 2011 at 8:07pm.

- Physics -
**Katie**, Sunday, May 22, 2011 at 8:08pmi mean 80 microfarads

- Physics -
**drwls**, Sunday, May 22, 2011 at 8:39pmThe time constant for charge decay is

RC = 3.6*10^-3 s, if your ì symbol means "micro"

For 80% of the initial energy, the charge must decrease to sqrt(0.8) = 89.4% of the initial value.

exp(-t/RC) = 0.894

t/RC = .1121

t = 4*10^-4 seconds

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