A simple electromagnet is constructed by coiling a length of copper wire around an screw. When electric current is passed through the wire, a magnetic field is produced, attracting needles made of steel. | |
Licence : | Droits gérés |
Crédit: | Science Photo Library / Science Source / Alexandre Dotta |
Taille de l’image : | 4651 px × 3308 px |
Model Release : | Non requis |
Property Release : | Non requis |
Restrictions : | - |