>> ZR=50;w=2*pi*50;ZL=1i*w*0.5;
>> ZC=-1i/(w*50e-6)

ZC =

   0.0000 -63.6620i

>> ZZ=ZR+ZL+ZC

ZZ =

  50.0000 +93.4177i

>> UU=230;
>> II=UU/ZZ

II =

   1.0243 - 1.9138i

>> IIM=sqrt(2)*II

IIM =

   1.4486 - 2.7065i

>> abs(IIM)

ans =

    3.0698

>> angle(IIM)

ans =

   -1.0794

>> SS=UU*conj(II)

SS =

   2.3560e+02 + 4.4018e+02i

>> abs(SS)

ans =

  499.2597

>> clear;
>> w=2*pi*800;ZC1=-1i/(w*180e-9);
>> ZC2=-1i/(w*220e-9);ZR=82;
>> Z1=ZR*ZC1/(ZR+ZC1);
>> ZZ=Z1+ZC2;
>> UU=24;
>> II=UU/ZZ;
>> IImA=II*1000;
>> IIMmA=IImA*sqrt(2)

IIMmA =

   3.3134 +36.9872i

>> abs(IIMmA)

ans =

   37.1353

>> angle(IIMmA)

ans =

    1.4815

>> SS=UU*conj(II)

SS =

   0.0562 - 0.6277i

>> abs(SS)

ans =

    0.6302

>> abs(SS)