Capacitors C1=3450 nF and C2=700nF are initially connected in parallel and hold

Question

Capacitors C1=3450 nF and C2=700nF are initially connected in parallel and hold a combined charge of Qtoti=783nC.FInd the charge on each capactitor Q1i,Q2i and the total energy Utoti stored in the system.The capacitors are then disconnected and reconnected, still in parallel, but with the terminals of one capacitor reversed, so the positively charged side of C1 is now connected to the negatively charged side of C2 and vice versa.Finc the combined charge Qtotf and total energy stored in the final state.

Explanation / Answer

C1 and C2 are in parallel

C1+C2=Ceq=4150nF

Q=CV

783nC=4150nFxV

V=5.3V

Q1( on C1)=3450nFx5.3V=18285.4nC

Q2(on C2)=700nfX5.3=3710nC

Energy=1/2CV^2=5.8286x10^-5J

Q=0 as of polarity

So energy and rest 0

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