Maxwell Laws Coffee Mug

* Gauss' law describes how an electric field is generated by electric charges: The electric field tends to point away from positive charges and towards negative charges. More technically, it relates the electric flux through any hypothetical closed "Gaussian surface" to the electric charge within the surface. * Gauss' law for magnetism states that there are no "magnetic charges" (also called magnetic monopoles), analogous to electric charges.[1] Instead the magnetic field is generated by a configuration called a dipole, which has no magnetic charge but resembles a positive and negative charge inseparably bound together. Equivalent technical statements are that the total magnetic flux through any Gaussian surface is zero, or that the magnetic field is a solenoidal vector field. An Wang's magnetic core memory (1954) is an application of Ampere's law. Each core stores one bit of data. * Faraday's law describes how a changing magnetic field can create ("induce") an electric field.[1] This aspect of electromagnetic induction is the operating principle behind many electric generators: A bar magnet is rotated to create a changing magnetic field, which in turn generates an electric field in a nearby wire. (Note: The "Faraday's law" that occurs in Maxwell's equations is a bit different than the version originally written by Michael Faraday. Both versions are equally true laws of physics, but they have different scope, for example whether "motional EMF" is included. See Faraday's law of induction for details.) * Ampère's law with Maxwell's correction states that magnetic fields can be generated in two ways: by electrical current (this was the original "Ampère's law") and by changing electric fields (this was "Maxwell's correction").