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Can someone explain how to find the intantaneous value of voltage in a capacitor at any specific instant in time. Im taking a course in electronics and the text book isn't really clear on this. I have the equation:

-t/T

Vc=E(1-e )

t=RC

Not sure why Im subracting from one. And why the negative symbols. Im sure this question is nonsense to an engineer or tech but Im stuck. Thanks

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# Help with RC circuits

**Physics Forums | Science Articles, Homework Help, Discussion**