How to measure the flux density within a certain wave
Answers
The magnetic flux density is also called "B field" or "magnetic induction". The B field of our super magnets can be calculated with the here stated formulas on the axis north-south-pole. Alternatively, computer programs can calculate fields in the whole room.
Table of Contents
Formula for block magnet flux density
Formula for cylinder magnet flux density
Formula for ring magnet flux density
Formula for sphere magnet flux density
Calculation table for flux density calculation
B fields in the whole room
The magnetic flux density of a magnet is also called "B field" or "magnetic induction". It is measured in tesla (SI unit) or gauss (10 000 gauss = 1 tesla).
A permanent magnet produces a B field in its core and in its external surroundings. A B field strength with a direction can be attributed to each point within and outside of the magnet. If you position a small compass needle in the B field of a magnet, it orients itself toward the field direction. The justifying force is proportional to the strength of the B field.
There are no simple formulas that calculate this field for the various magnetic shapes. Computer programs were developed for that purpose (see below). There are simple formulas for less complex symmetrical geometries, which indicate the B field on a symmetry axis in north-south pole direction. Subsequently, we are glad to share these with you.
Formula for block magnet flux density
Formula for the B field on the symmetry axis of an axially magnetised block magnet (block or cube
Br: Remanence field, independent of the magnet's geometry (see physical magnet data)
z: Distance from a pole face on the symmetry axis
L: Length of the block
W: Width of the block
D: Thickness (or height) of the block
The unit of length can be selected arbitrarily, as long as it is the same for all lengths.