Particle a has charge qa and particle b has charge qb. when they are separated by a distance ri, they experience an attractive force fi. the particles are moved without altering their charges. now they experience an attractive force with a magnitude of 16fi. find an expression for their new separation. (use the following as necessary: qa, qb, ri, and ε0.)

Explanation:

We know force between 2 charges is given by

It is given initial force is attractive of magnitude

Let be the initial separation

Thus

Now

Let be the final separation

Thus final force becomes

It is given = ...................(i)

Using values of   and in equation i we have

=

thus

Thus the final separation is one-fourth of the initial separation

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