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Can someone please help me figure out 3.3 and 3.4?
Image for 13. A change is made to C3, such that Ceq is now 11.0 muF. With this change, what is the charge on C1? (3 poin?
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Answer #1

3.3)

Ceq = 11e-6 F


Q1 = Ceq*V = 11e-6*15 = 165 uC

3.4)

U = 0.5*Q1^2/c1 = (0.5*90e-6*90e-6)/(165e-6) = 200 nJ

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