Update images/H_dipole.png, README.md

Deleted images/B_dipole.png

README.md

@@ -10,7 +10,7 @@ Current carrying wires get boundary conditions, and in this case a single value
 
 For permanent magnets we can use the equations for point source [magnetic dipoles](https://en.wikipedia.org/wiki/Magnetic_moment):
 
-![alt_text](images/B_dipole.png "B_dipole")
+![alt_text](images/H_dipole.png "H_dipole")
 
 Magnetic dipoles get boundary conditions and a magnetization vector m, which can be applied to a magnetic region at any angle and magnitude within the XY plane. The dirac delta term is applied only if calculating magnetic field strength [inside a magnetic material](https://en.wikipedia.org/wiki/Magnetic_moment#Internal_magnetic_field_of_a_dipole).