Magnetic field due to infinite wire
===================================

The magnitude of the magnetic flux density due to a thin, straight, infinite wire depends on the
current through it and the radial distance to the wire.

**Notation:**

#. :math:`\mu_0` (:code:`mu_0`) is :attr:`~symplyphysics.quantities.vacuum_permeability`.

**Conditions:**

#. The wire is uniform, straight, and thin.

**Links:**

#. `Physics LibreTexts, formula 12.3.7 <https://phys.libretexts.org/Bookshelves/University_Physics/University_Physics_(OpenStax)/University_Physics_II_-_Thermodynamics_Electricity_and_Magnetism_(OpenStax)/12%3A_Sources_of_Magnetic_Fields/12.03%3A_Magnetic_Field_due_to_a_Thin_Straight_Wire>`__.

.. py:currentmodule:: symplyphysics.laws.electricity.magnetic_field_due_to_infinite_wire

.. py:data:: magnetic_flux_density

    Magnitude of :attr:`~symplyphysics.symbols.electrodynamics.magnetic_flux_density`.

Symbol:
    :code:`B`

Latex:
    :math:`B`

Dimension:
    :code:`magnetic_density`


.. py:data:: current

    :attr:`~symplyphysics.symbols.electrodynamics.current` flowing through the wire.

Symbol:
    :code:`I`

Latex:
    :math:`I`

Dimension:
    :code:`current`


.. py:data:: radial_distance

    Radial distance to wire. See :attr:`~symplyphysics.symbols.classical_mechanics.distance_to_axis`.

Symbol:
    :code:`r`

Latex:
    :math:`r`

Dimension:
    :code:`length`


.. py:data:: law

    :code:`B = mu_0 * I / (2 * pi * r)`


    Latex:
        .. math::
            B = \frac{\mu_0 I}{2 \pi r}