A poem for sunday

The integral sum of the displacement field over any surface is equal to the free charge within that surface.

The divergence of magnetic flux density is zero.

The curl of the magnetic field is equal to the current (including the displacement current).

The electro-motive force induced around a loop is equal to the rate of change of magnetic flux cutting the area bounded by that loop.

In the name of Faraday, Ampere and the Holy Gauss.

Amen.