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## Homework Statement

Given the E field

E = 18/R

^{2}

**R**,

**R**is the radial direction.

Find the electric potential between A and B where A is at +2m and B at -4m, both on the z axis.

## The Attempt at a Solution

My question is, since E field depends only on R, the distance between the point and the origin, then E field is the same for point B at -4m and point C at +4m. Therefore they are equipotential. Therefore I can compute the potential difference between A at +2m and C at +4m. Is this reasoning correct?