# Two identical charged spheres suspended from a common point by two massless strings of lengths , are initially at a distance d (d << ) apart because of their mutual repulsion. The charges begin to leak from the both the spheres at a constant rate. As a result, the spheres approach each other with a velocity . Then varies as a function of the distance x between the spheres as: Option 1) Option 2) Option 3) Option 4)

As discussed in

Coulombic force -

- wherein

K - proportionality Constant

Q1 and Q2 are two Point charge

Where

Option 1)

This option is incorrect.

Option 2)

This option is incorrect.

Option 3)

This option is correct.

Option 4)

This option is incorrect.

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