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Mastering Physics: Hw-Ch25 Google Chrome https:// mastering physics.com View? assignment ProblemID 50928554 Session Summer 2015 PHYS 193 30535 Hw-Ch25 Problem 25.84 Problem 25.84 Part A Consider the circuit shown in the following figure. The What is the final charge on C2? battery has emf 50.0 V and negligible internal Express your answer with the appropriate units. resistance. R 1.00 2, Ch 1.00 AuF and C2 7.00 After the capacitors have attained their final charges, the charge on Ch i Q1 19.0 AuC. (Figure 1 92 133 AC My Answers Give Up Correct Part B What is the resistance R1 Express your answer with the appropriate units. Figure 1 v of 1 alue 2 Submit My Answers Give U Incorrect, Try Again, 5 attempts remaining Help Close Resources previous l 6 of 6 l return to assignment Continue Provide Feedback

Explanation / Answer

a.

C1Q1= C2Q2

1.00*10^-6* 19.0*10^-6 = 7.00*10^-6 * Q2

Q2=2.71*10^-6 C

b.

i2 R2 = Q2/C2

i2 *1.00*10^-6 = 2.71*10^-6 / 7.00*10^-6

i2=3.871*10^5 A

Apply Kirchoff's law:

emf - i2 R2 -i2 R1 =0

50.0 - 3.871*10^5* 1.00*10^-6 - 3.871*10^5* R1=0

R1=0.128 milli ohm

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