Part A Problem 17.45 Determine te pokrthal dnrence across te fir otor A250 pF ca

Question

Part A Problem 17.45 Determine te pokrthal dnrence across te fir otor A250 pF capactor is charged to 743 V and a 6 80-phF Express your answer using three significant figures and include the appropriate units then disconneced from ther batteries Net the positive ptes are connecied to each oher and the negative pates are cornecied to each oher. What will be the potentia aierence across each and the charge on each? Hint Charge s conserved] ViValue Units My Answers Give Up Part B Delemine the potential ditterence across the second capacitor Express your answer using three significant figures and include the appropriate units. ½. | Value Units My Answers Gm Part C Type here to search

Explanation / Answer

Given,

C1 = 2.5 uF and C2 = 6.8F

V1 = 743 V and V2 = 572 V

a)We know that the charge is conserved. So the system will have a total charge of

Q = Q1 + Q2

Q = C1 V1 + C2 V2

Q = 2.5 uF x 743 + 6.8 uF x 572 = 5747.1 uC

Ceq = (C1 + C2) = 2.5 + 6.8 = 9.3 uF

V1' = V2' = 618 Volts ----------------> ans A and B

b) Q1 = V1' x C1 = 618 x 2.5 F = 1545 uC

Q2 = V2' x C2 = 618 x 6.8 F = 4202 uC

Hence, Q1 = 1545 uC and Q2 = 4202 uC -------------> Ans C and D

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