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May 26, 2015

Homework Help: maths

Posted by Rachael on Friday, March 22, 2013 at 9:13am.

Given the the instantaneous voltage across a capacitor is VC=40(1-e -t/CR) Volts When being charged by a 40 volt DC supply, find the time, t for VC to reach 18 volts after the charging process has started if C = 100F and R = 20k

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