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September 20, 2014

September 20, 2014

Posted by **Julie Calder** on Monday, February 17, 2014 at 10:05pm.

- Physics -
**Julie Calder**, Monday, February 17, 2014 at 10:06pmthat was 1.0 MOhms

- Physics -
**bobpursley**, Monday, February 17, 2014 at 10:32pmRC time constant: 2E-6*1E=6=2seconds

V=Vo (1-e^(-t/RC))

with a little math,

.25=e^-t/rc

take the ln of each side..

-ln(.25) * RC=t

-2ln(.25)=t

t=2.77 seconds check that

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