A Pictorial Approach to Lenz’s Law

• Andrew Duffy ^[1]
  1. [1] Boston University

     Boston University

     City of Boston, Estados Unidos

     
• Localización: The Physics Teacher, ISSN 0031-921X, Vol. 56, Nº. 4, 2018, págs. 224-225
• Idioma: inglés
• Texto completo no disponible (Saber más ...)
• Resumen

  • This paper describes a pictorial approach to Lenz’s law that involves following four steps and drawing three pictures to determine the direction of the current induced by a changing magnetic flux. Lenz’s law accompanies Faraday’s law, stating that, for a closed conducting loop, the induced emf (electromotive force) created by a changing magnetic flux sets up a current in the loop that tends to oppose the change in flux. Students are often confused by this, but drawing a sequence of three pictures can make it clearer to students how Lenz’s law is applied.