Consider the following code:
DSolve[{0 == c''[t] + 100/0.001 c'[t] + c[t]/(0.001*0.0005), c[0] == 0,
c'[0] == 0}, c[t], t] // Simplify
and it returns c[t]->0
This is the differential equation of an RLC series circuit whit a continuous voltage source.
Regards.
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Thanks, Fixed! But I still do not know why the code is wrong.
The answer you got is correct for your initial conditions – you specified 0 for c[0] and no velocity (c’[0]) so the system cannot move.
Try changing the initial condition and you get a different response:
DSolve[{0==c''[t]+100/0.001 c'[t]+c[t]/(0.001*0.0005),c[0]==0,c'[0]==1},c[t],t]//Simplify
to get
(* {{c[t] -> -0.000010004 E^(-99980. t) + 0.000010004 E^(-20.004 t)}} *)