What is the electric potential at a point P, distance r from the mid-point of ann electric dipole of moment p(=2aq) ?

Options

A. `V = (p cos theta)/(4pi epsilon_(0)r^(2))`
B. `V = (p cos theta)/(4pi epsilon_(0)r)`
C. `V = (p sin theta)/(4pi epsilon_(0)r)`
D. `V = (p cos theta)/(4pi epsilon_(0)r^(3))`

Answer

A

Explanation

`V = (p cos theta)/(4pi epsilon_(0)(r^(2) - a^(2) cos^(2) theta)) = (p cos theta)/(4pi epsilon_(0) r^(2))` when `2a lt lt r`.