Faraday's Electromagnetic Induction |
|||
Author(s): Aldo Cos & Tom Schuster | Demonstration Equipment
- Teacher's Guide SED 695B; Fall 2005 |
||
Principles illustrated: Electromagnetic Induction
|
|
||
Standards addressed: Physics 5f:
|
|||
Materials |
Explanation of principles involved
|
||
|
Students may wonder how transformers and generators work. Here is described a potential lab or demonstration of Faraday's principle of electromagnetic induction.Since the copper coils contain a changing electric charge, an object placed within the electric field will become charged (magnetized). When the rod is pushed in and out of the coils, the magnetic field around the coils is changed. This in turn makes the electrons (current) in the coil move. This can be observed by the alternating (+) and (-) movements on the galvanometer. Alternatively, or additionally, the apparatus can be rearranged so that an electrical current generated from a battery is passed through the coil. The rod becomes magnatized and can be used to pick up small metal objects, like paper clips. | ||
Procedure:
|
|||
References & Links:
|