Question

# Two identical small conducting spheres having unequal positive charges q1 and q2 are separated by a distance r. If they are now made to touch each other and then separated again to the same distance, the electrostatic force between them in this case will be :

A
less than before
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B
same as before
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C
more than before
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D
zero
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Solution

## The correct option is C more than beforeBefore touch the electrostatic force between them is F=kq1q2r2When they are touched, the charge will flow still they have same potential. So the average charge on each sphere is qa=q1+q22Thus, qa>q1 and qa>q2 So, after touch the force between them will be more than before.

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