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In the circuit shown in figure $C_{1} = 1 μ F$ and $C_{2} = 2 μ F$ . Capacitor $C_{1}$ is charged to $100 V$ and $C_{2}$ is charged to $20 V$ . After charging they are connected as shown. When the switches $S_{1}, S_{2}$ and $S_{3}$ all are closed, the charge flowing through $S_{1}$ is

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$40 μ C$ charge will flow through $S_{2}$

$80 μ C$ charge will flow through $S_{1}$

$60 μ C$ charge will flow through $S_{3}$

No charge will flow through $S_{2}$

answer is B.

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Detailed Solution

When $S_{1}, S_{2}$ and $S_{3}$ all are closed, both the capacitors are in parallel. Charges in the two cases are shown in figure

From the figure it is clear that charge will flow through $S_{1}$ .

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