Insights Blog
-- Browse All Articles --
Physics Articles
Physics Tutorials
Physics Guides
Physics FAQ
Math Articles
Math Tutorials
Math Guides
Math FAQ
Education Articles
Education Guides
Bio/Chem Articles
Technology Guides
Computer Science Tutorials
Forums
Intro Physics Homework Help
Advanced Physics Homework Help
Precalculus Homework Help
Calculus Homework Help
Bio/Chem Homework Help
Engineering Homework Help
Trending
Featured Threads
Log in
Register
What's new
Search
Search
Search titles only
By:
Intro Physics Homework Help
Advanced Physics Homework Help
Precalculus Homework Help
Calculus Homework Help
Bio/Chem Homework Help
Engineering Homework Help
Menu
Log in
Register
Navigation
More options
Contact us
Close Menu
JavaScript is disabled. For a better experience, please enable JavaScript in your browser before proceeding.
You are using an out of date browser. It may not display this or other websites correctly.
You should upgrade or use an
alternative browser
.
Forums
Homework Help
Engineering and Comp Sci Homework Help
RLC circuit solved with Laplace transformation
Reply to thread
Message
[QUOTE="MaxR2018, post: 6015505, member: 647469"] Hi, i need some help here. Can you help me?:sorry: Here is the problem. Exercise statement: The switch have been closed for a long time y is opened at t=0. Using Laplace's transtormation calculate V0(t) for t ≥ 0 [B] [ATTACH=full]227113[/ATTACH] [/B]This is what i made to solve it: 1) I know while the switch is closed, the current trough the circuit is i=12v/200, so i=60mA. 2) When the switch is opened at t=0, i use the voltages law of kirchoff: 12 = vc + vr + vl 12= (1/c)*(integrate of i dt from 0 to t) + vc(0) + iR + L(di/dt) i know that vc(0) = 0 so : 12= (1/c)*(integrate of i dt from 0 to t) + iR + L(di/dt) Then i used the laplace transformation: 12/s = I(s)/Sc + RI(S) + LSI(S) - LI(0) And i know that LI(0)=60mA so: 12/s = I(s)/Sc + RI(S) + LSI(S) - 60mA Finally i calculate I(S) and then i obtain i(t) with the antitransformation of Laplace. Then, with i(t) i calculate vt knowing that: VL=L*(di/dt), but i obtain a diferent solution. I obtain that V0(t) = -300000*e^(-5000t) + 12e^(-5000t) What I am doing wrong?? I thing I am having a mistake with some signs. Pd: Sorry for my bad english. Thanks for reading me! [/QUOTE]
Insert quotes…
Post reply
Forums
Homework Help
Engineering and Comp Sci Homework Help
RLC circuit solved with Laplace transformation
Back
Top