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Q.

The centers of two identical small conducting spheres are 1 m apart. They carry charges of opposite kind and attract each either with a force F. When they are connected by a conducting thin wire they repel each other with a force F/3. What is the ratio of magnitude of charges carried by  the spheres initially?

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a

31

b

32

c

1

d

34

answer is A.

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Detailed Solution

q1q2=F                                                        …(i)

           q1-q22q1-q22=F3                 …(ii)

Solving these two equations, we get take q1q2=x and solve

            q1q2=31

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