- #1
Crystal037
- 167
- 7
- Homework Statement
- Find the electrostatic potential due to a dipole
- Relevant Equations
- V=Q/4*pi*ebselon
Given here is that by geometry
r1^2 =r^2 +a^2 - 2ar*cos(theta)
But if we try to do vector addition then since direction of dipole is upwards then it should be
r^2 =r1^2 +a^2 + 2ar1*cos(alpha)
Where alpha is the angle between a and r1. I Don,'t understand how they get it by geometry