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Q.

In the figure, initial status of capacitance and their connection is shown. Which of the following is incorrect about this circuit ?

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a

Final charge on each capacitor will be zero

b

Final total electrical energy of the capacitors will be zero

c

Total charge flown from A to D is 30 μC

d

Total charge flown from A to D is – 30 μC

answer is D.

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Detailed Solution

Let the charge flown from A to D be x.

Charge on 2μF capacitor q1 = 30μC - x

Charge on 3μF capacitor q2= -30μC+x

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-30+x3+30-x2=30-30 x=30μC

Charge flown from A to D is + 30 μC.

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