Power via current and resistance
================================

Electric power can be expressed using current flowing through a
conductor and its resistance. Applied to AC circuits, the power in this law is the
instantaneous power in the circuit.

**Links:**

#. `Wikipedia <https://en.wikipedia.org/wiki/Electric_power#Resistive_circuits>`__.

.. py:currentmodule:: symplyphysics.laws.electricity.power_via_current_and_resistance

.. py:data:: power

    Electric :attr:`~symplyphysics.symbols.basic.power`.

Symbol:
    :code:`P`

Latex:
    :math:`P`

Dimension:
    :code:`power`


.. py:data:: current

    Electric :attr:`~symplyphysics.symbols.electrodynamics.current`.

Symbol:
    :code:`I`

Latex:
    :math:`I`

Dimension:
    :code:`current`


.. py:data:: resistance

    Electrical :attr:`~symplyphysics.symbols.electrodynamics.electrical_resistance`.

Symbol:
    :code:`R`

Latex:
    :math:`R`

Dimension:
    :code:`impedance`


.. py:data:: law

    :code:`P = I^2 * R`


    Latex:
        .. math::
            P = I^{2} R