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Author Topic: RC Circuits  (Read 461395 times)
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ahmedelshfie
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Reply #30 on: November 16, 2011, 09:45:55 pm » posted from:-,-,BRAZIL

Well, you gonna find all what you want inside the zip file. all classes of java, you just need to download as i explain in my last post.
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Reply #31 on: March 28, 2014, 07:29:34 pm » posted from:KUWAIT,AL ASIMAH,KUWAIT

dear Author,
I am a student and I want to ask about the method by which we can conclude a formula for calculating the current I as a function of time while discharging a capacitor ( in RC circuits of course ) because the method shown in my book gives a negative sign of a decreasing current and by using the opposite direction on the drawn circuit I get a positive "increasing" current.

regards,
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Fu-Kwun Hwang
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Reply #32 on: March 30, 2014, 03:14:03 pm » posted from:,,Satellite Provider

Assume the charge in capacitor is q,  the current is defined as I=dq/dt
, then I=dq/dt> 0 while charging (I>0 means current flow into the capacitor),
and I=dq/dt<0 while discharging (I<0 means current flow out of capacitor).

If you defined I' mean current flow into the capacitor, then dq/dt=-I' while discharging (in this case: you got a negative sign of current I'). 
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