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951% e Edit View History Bookmarks People Window Help e Home × a Two Capacitors Are Connect X MasteringPhysics: Ch 24 HW Secure! https: Ch24 HW Problem 24.61 session master ngphysics.com myct itemView?assignmentProblemID.89184890 What is the charge on the 4.3 F capa hor? Express your answer using two significant figures. Constants Treo capacitors having capacitances of 8.5 F 8.1 ,and 43pEare corrected in series across a 38.V potertial difference. Qs- Submit Reqvest Answer Part B What is the total energy stored in all three capacitors? Express your answer using two significant figures Submit

Explanation / Answer

a) Total capacitance

1/C = 1/C1 + 1/C2 + 1/C3

1/C = 1/8.5 + 1/8.1 + 1/4.3

C = 2.11 uF

Q = CV = 2.11*36 = 76 uC

c) eneryg stored in the capctiors

for 8.5 uF = Q^2 / 2C = (76*10^-6)^2 / 2*8.5*10^-6 = 3.4*10^-4 J

for 8.1 uF = (76*10^-6)^2 / 2*8.1*10^-6 = 3.56*10^-4 J

for 4.3 uF = (76*10^-6)^2 / 2*4.3*10^-6 = 6.7*10^-4 J

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