what is the potential at a point that is 25% of the way from one particle to the other?

The potential at a point is 400 V.

Explanation:

Given that,

The electric potential at a point that is halfway between two identical charged particles is 300 V

Potential V= 300 V

Let the distance between the charge is 2r.

The potential at mid point

Using formula of potential

At mid point,

…(I)

If the potential at a point that is 25% of the way from one particle to the other

We need to calculate the distance between the charge

We need to calculate the new potential

Using formula of potential again

Put the value of 

Hence, The potential at a point is 400 V.

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