Molecular Expressions: Electricity and Magnetism - Interactive Java Tutorials: Faraday's Magnetic Field Induction Experiment Galleria License Info Image Use Custom Photos Partners Site Info Contact Us Publications Home Visit Science, Optics, & You The Galleries: Photo Gallery Silicon Zoo Pharmaceuticals Chip Shots Phytochemicals DNA Gallery Microscapes Vitamins Amino Acids Birthstones Religion Collection Pesticides BeerShots Cocktail Collection Screen Savers Win Wallpaper Mac Wallpaper Movie Gallery Faraday's Magnetic Field Induction Experiment When Michael Faraday made his discovery of electromagnetic induction in 1831, he hypothesized that a changing magnetic field is necessary to induce a current in a nearby circuit. To test his hypothesis he made a coil by wrapping a paper cylinder with wire. He connected the coil to a galvanometer, and then moved a magnet back and forth inside the cylinder. Click and drag the magnet back and forth inside the coil. When you move the magnet back and forth, notice that the galvanometer needle moves, indicating that a current is induced in the coil. Notice also that the needle immediately returns to zero when the magnet is not moving. Faraday confirmed that a moving magnetic field is necessary in order for electromagnetic induction to occur. BACK TO ELECTRICITY & MAGNETISM TUTORIALS Questions or comments? Send us an email. © 1995-2021 by Michael W. Davidson and The Florida State University. All Rights Reserved. No images, graphics, software, scripts, or applets may be reproduced or used in any manner without permission from the copyright holders. Use of this website means you agree to all of the Legal Terms and Conditions set forth by the owners. This website is maintained by our Graphics & Web Programming Team in collaboration with Optical Microscopy at the National High Magnetic Field Laboratory. Last Modification: Friday, Mar 31, 2017 at 09:10 AM Access Count Since September 6, 1999: 2190354
