session.masteringphysics.com Part A How much energy must a 18 v battery expend t

Question

session.masteringphysics.com Part A How much energy must a 18 v battery expend to charge a 0.25and a 0.26 capacitor fully when they are placed in parallel? Express your answer to two significant figures and include the appropriate units. Valtue Units Part B How much energy must a 18 v battery expend to charge a 0.25 and a 0.26 capacitor fully when they are placed in Series? Express your answer to two significant figures and include the appropriate units. UValue Units Part C How much charge flowed from the battery in each case? Express your answers using two significant figures separated by a comma. Home Bookmarks Tabs Back Forward

Explanation / Answer

C1=0.25 uF

C2=0.26 uF

(A)Equivalent capacitance=C1+C2=C=0.51 uF

energy=0.5*C*V^2=8.262*10^(-5) J

(B) Equivalent capacitance when connected in series=C=C1*C2/(C1+C2)=12.74 uF

energy=0.5*C*V^2=2.06*10^(-3) J

(C) when in parallel

charge across C1=C1*V=4.5*10^(-6) C

charge across C2=C2*V=2.16*10^(-6) C

Charge across battery=6.66*10^(-6) C

when in series

charge acrossC1=C*V=9.18*10^(-6) C

charge across C2=9.18*10^(-6) C

charge across battery=9.18*10^(-6)C

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