The power p(accepted) by a capacitor P=U=CU dt The energy. u(t) dwc= pdt=Clu dt=c odu=C(0(t)-0(to), (to0) dt U(t0) or wr(t)-wc(o 2 =C{U(t)-02(t0) JU(t0)=0 C(=CUThe power p (accepted) by a capacitor: dt d p i C  = =  The energy: dt C d C{ (t ) (t )} dt d dw pdt C ( t ) ( t ) t t w ( t ) w ( t ) t t C C C 0 2 2 2 1 0 0 0 0         = = = = −     2 0 2 1 If (t ) = 0 wC (t) = C { ( ) ( )} 2 1 ( ) ( ) 0 2 2 0 or w t w t C t t C − C =  −