Re: capacitor equation solution not working

*To*: mathgroup at smc.vnet.net*Subject*: [mg119708] Re: capacitor equation solution not working*From*: Dana DeLouis <dana.del at gmail.com>*Date*: Sat, 18 Jun 2011 06:20:48 -0400 (EDT)

.. I[t_]:= If[t<10||t>60,0,1] As a side note, for a pulse, perhaps one of these two alternatives. f[t_]:=UnitStep[t-10] - UnitStep[t-60] f[t_]:=UnitStep[ -(t-10) (t-60)] = = = = = = = = = = HTH : >) Dana DeLouis On Jun 17, 12:09 am, "J and B" <noslow... at comcast.net> wrote: > I am trying to solve a very simple circuit, one that has only a capacitor in > it. What am I doing wrong? The final graph should show that the capacitor > has discharged, but its staying constant. I have current starting at t=10 > and ending at t=60. > I hope I have used the correct way to put in my code, I am using a new > computer and I having trouble with my email program. Any advice would be > appreciated. > > Thanks > > My code. > I[t_]:= If[t<10||t>60,0,1] > Plot[i[t],{t,0,100}] > Eq=v'[t]==i[t]/c > c=1; > Soleq==v[t]/.NDSolve[{eq,v[0]==0},v[t],{t,0,100}],[[1]] > Plot[soleq,{t,0,100}]