Lenz's Law Demonstration Using an Ultrasound Position Sensor

• Autores: Petru S. Fodor, Tara Peppard
• Localización: The Physics Teacher, ISSN 0031-921X, Vol. 50, Nº. 6, 2012, pág. 344
• Idioma: inglés
• Texto completo no disponible (Saber más ...)
• Resumen

  • One of the very popular demonstrations used in introductory physics courses to illustrate Lenz's law is the �slowly falling magnet.� In its simplest version it requires only a powerful cylindrical magnet and a metal tube, typically of copper or aluminum. When dropped in the tube the magnet takes significantly longer to reach the other end than a geometrically similar but nonmagnetic object. This demonstration has been adapted for use in large classes using a camera to monitor the magnet as it approaches the end of the tube.1 Small versions that can be used for hands-on experiments also have been developed2 or are available commercially.3 This classical demonstration in its various forms almost never fails to impress first-time viewers