Sun, 2 January 2011
This video shows a couple of torches/flashlights that use electromagnetic induction to function. They do not need batteries. The second part of this video shows a simple handheld electric generator which is one of the most common applications of electromagnetic induction. The video also shows that the electric generator is nothing else than an electric motor used in reverse (i.e. instead of putting a current through a coil placed in a magnetic field in order to obtain motion, we turn the coil in a magnetic field in order to generate an induced current).
Direct download: Applications_of_electromagnetic_induction_iPhone__iPod.m4v
Category:Quick Demos -- posted at: 6:19pm CEST