Problem 25.84 Consider the circuit shown in the following figure. The battery ha

Question

Problem 25.84 Consider the circuit shown in the following figure. The battery has emf 57.0 V and negligible internal resistance. R 1.00 S2, Ch -2.00 AuF, and C2 6.00 AuF After the capacitors have attained their final charges, the charge on Cl is Q1 15.0 HC.(Figure 1) Figure 1 of 1 V Part A What is the final charge on C? Express your answer with the appropriate units. 45 HV Q2 Submit My Answers Give Up Incorrect Try Again, 2 attempts remaining Part B What is the resistance RI? Express your answer with the appropriate units. alue Units Submit My Answers Give U

Explanation / Answer

potential differene across C1 = V1 = Q1/C1 = (15*10^-6)/(2*10^-6) = 7.5 v

C2 & C1 are parallel

potential difference across C2 = V2 = V1 = 7.5 V

Q2 = C2*V2 = 6*7.5*10^-6 = 45 uC   <<<-----answer

part(B)

R1 is parallel to C1

potential across R2 = V1 = 7.5

current through R2 = i = 7.5/1 = 7.5 A

potential across R1 = e - 7.5 = 49.5 v

resistance R1 = 49.5/i = 49.5/7.5 = 6.6 ohms <<<-----answer

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