Magnetic Field and Magnetic Induction in a Cylindrical Bar Magnet
Magnetic Field and Magnetic Induction in a Cylindrical Bar Magnet
This Demonstration shows the quantitative magnetic field and magnetic induction for a cylindrical bar magnet. The magnetization is assumed to be in the direction and uniform within a magnet of diameter and length . Colors on a logarithmic scale show field intensity and arrows show its direction. The field and induction outside the magnet satisfy , so the field patterns are identical (the same color is used for both fields). They are different inside the magnet, since there . While vectors go from the north pole to the south pole (top to bottom) in all regions, vectors return to the north pole through the magnetized body.
M
z
d
L
H
B
B=H
μ
0
B=(H+M)
μ
0
H
B