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Q.

A condenser A of capacity 4µF has a charge 20µC and another condenser B of capacity 10µF has a charge 40µC . If they are connected parallel, then

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a

charge flows from A to B till charges on them are equal.

b

charge flows from B to A till common potential is reached

c

charge flows from B to A till the charges on them are equal.

d

charge flows from A to B till common potential is reached

answer is C.

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Detailed Solution

 In parallel potential constant V=C1V1+C2V2C1+C2

 then find charges q11=C1V,q21=C2V

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