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Q.

Both capacitors are initially uncharged and then connected as shown and switch is closed. What is the potential difference across the 3 μF capacitor ?

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a

25V

b

30V

c

10V

d

None of these

answer is B.

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Detailed Solution

Let q charge flow through the circuit then using Kirchhoff's law

19+15-q3−9-q2=0⇒25-5q6=0⇒q=30μC

P.D. across 3 μF is V=30μC3μF=10V

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