Skip to main content
`Ctrl`+`K`

# magnetic_flux_field

astropy.units.magnetic_flux_field(mu_r=1)

  Convert magnetic field between magnetic field strength \((\mathbf{H})\) and magnetic flux density \((\mathbf{B})\) using the relationship:

  \[\mathbf{B} = \mu_r \mu_0 \mathbf{H}\]
  where:

    - \(\mu_0\) is the vacuum permeability, a physical constant.

    - \(\mu_r\) is the relative permeability of the medium, a dimensionless quantity.

  The default setting (\(\mu_r=1\)) represents conditions in a vacuum.

  Parameters:
    mu_r `python:float`, optional

      The relative magnetic permeability of the medium. This is a dimensionless quantity and has a default value of \(\mu_r=1\) which corresponds to free space (vacuum).

  Examples

      >>> import astropy.units as u
      >>> H = 1 * u.Oe
      >>> H.to(u.G, equivalencies=u.magnetic_flux_field())
      <Quantity 1. G>
      >>> H.to(u.G, equivalencies=u.magnetic_flux_field(mu_r=0.8))
      <Quantity 0.8 G>
      >>> B = 1 * u.T
      >>> B.to(u.A / u.m, equivalencies=u.magnetic_flux_field())
      <Quantity 795774.71502628 A / m>
      >>> B.to(u.A / u.m, equivalencies=u.magnetic_flux_field(mu_r=0.8))
      <Quantity 994718.39378285 A / m>