Recuperado de: http://platea.pntic.mec.es/curso20/34_flash/html8/

http://www.librosvivos.net/smtc/homeTC.asp?TemaClave=1124

http://platea.pntic.mec.es/curso20/34_flash/html8/

http://www.asifunciona.com/electrotecnia/ke_ley_ohm/ke_ley_ohm_1.htm

http://hyperphysics.phy-astr.gsu.edu/hbasees/electric/farlaw.html

https://sites.google.com/site/timesolar/electricidad/electromagnetismo