Orders of magnitude (magnetic field)

This page lists examples of magnetic induction B in teslas and gauss produced by various sources, grouped by orders of magnitude.

The magnetic flux density does not measure how strong a magnetic field is, but only how strong the magnetic flux is in a given point or at a given distance (usually right above the magnet's surface). For the intrinsic order of magnitude of magnetic fields, see: Orders of magnitude (magnetic moment).

Note:

• Traditionally, the magnetizing field, H, is measured in amperes per meter.
• Magnetic induction B (also known as magnetic flux density) has the SI unit tesla [T or Wb/m²].
• One tesla is equal to 10⁴ gauss.
• Magnetic field drops off as the inverse cube of the distance from a dipole source.
• Energy required to produce laboratory magnetic fields increases with the square of magnetic field.

Examples

These examples attempt to make the measuring point clear, usually the surface of the item mentioned.

References

See also

• Orders of magnitude (magnetic moment)