Magnetic moment via current and contour area
============================================

The **magnetic moment** is the main physical quantity characterizing the magnetic
properties of a substance, that is, the ability to create and perceive a magnetic
field.

**Conditions:**

#. Ideally, the conductor itself should be infinitely thin. But a conductor can have
   any shape and size if its dimensions can be neglected relative to the size of the
   closed circuit that it forms.

#. The plane must be flat for this formula to be applicable, and the current must
   only make one turn around the contour.

**Links:**

#. `Wikipedia <https://en.wikipedia.org/wiki/Magnetic_moment#Amp%C3%A8rian_loop_model>`__.

..
    TODO rename file

.. py:currentmodule:: symplyphysics.laws.electricity.maximum_moment_of_magnetic_field

.. py:data:: moment

    :attr:`~symplyphysics.symbols.electrodynamics.magnetic_moment`.

Symbol:
    :code:`m`

Latex:
    :math:`m`

Dimension:
    :code:`area*current`


.. py:data:: current

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

Symbol:
    :code:`I`

Latex:
    :math:`I`

Dimension:
    :code:`current`


.. py:data:: area

    Contour :attr:`~symplyphysics.symbols.classical_mechanics.area`.

Symbol:
    :code:`A`

Latex:
    :math:`A`

Dimension:
    :code:`area`


.. py:data:: law

    :code:`m = I * A`


    Latex:
        .. math::
            m = I A