Lenz's law

Physicist Emil Lenz (pronounced /ˈlɛnts/) formulated Lenz's law in 1834, after which it was named for him.

Magnetic fieldsEdit

"The direction of current induced in a conductor by a changing magnetic field due to Faraday's law of induction will be such that it will create a field that opposes the change that produced it."[1]

For current I that generates a magnetic field


The induced current generated


Theoretical Lenz's lawEdit

Def. "a law of electromagnetic induction which states that an electromotive force, induced in a conductor, is always in such a direction that the current it would produce would oppose the change which caused it; it is a form of the law of conservation of energy"[2] is called Lenz's law.


  1. Emil Lenz (1834). "Ueber die Bestimmung der Richtung der durch elektodynamische Vertheilung erregten galvanischen Ströme". Annalen der Physik und Chemie 107 (31): 483–494. http://gallica.bnf.fr/ark:/12148/bpt6k151161/f499.image.r=lenz.langEN. Retrieved A partial translation of the paper is available in W. M. Magie, (1963), A Source Book in Physics, Harvard: Cambridge MA, pp. 511–513. 
  2. SemperBlotto (24 March 2006). "Lenz's law, In: Wiktionary". San Francisco, California: Wikimedia Foundation, Inc. Retrieved 2017-05-25. {{cite web}}: |author= has generic name (help)

External linksEdit