University of Guelph
Magnet Lab: Dc Circuits
This site describes and demonstrates a number of important concepts related to direct current circuits. Information on many of the featured topics, such as the use of Ohm's law and Kirchhoff's laws. Examples of featured topics include...
Wikimedia
Wikipedia: Permeability
This site from the encyclopedia Wikipedia provides a concise definition of magnetic permeability given in terms of magnetic flux density and magnetic field strength.