### Author Topic: RC Circuits  (Read 608117 times)

#### ahmedelshfie

• Hero Member
• Posts: 930
##### Re: RC Circuits
« Reply #30 on: November 16, 2011, 10:45:55 pm »
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.

#### Areej

• Newbie
• Posts: 1
##### Re: RC Circuits
« Reply #31 on: March 28, 2014, 08:29:34 pm »
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,

#### Fu-Kwun Hwang

• Hero Member
• Posts: 3062
##### Re: RC Circuits
« Reply #32 on: March 30, 2014, 04:14:03 pm »
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').

#### diinxcom

• Newbie
• Posts: -25
• Designer
##### Re: RC Circuits
« Reply #33 on: December 14, 2014, 06:18:19 pm »
-*-
Oh, GOD it hards... I not understand...
Sorry i am newbe

#### diinxcom

• Newbie
• Posts: -25
• Designer
##### Re: RC Circuits
« Reply #34 on: January 30, 2015, 08:45:31 pm »
Thanks for this program, I like it