Electromagnet being used to lift waste metal at a scrapyard. An electromagnet is only magnetised when an electric current is flowing through it,allowing it to be turned on and off when required | |
Lizenzart: | Lizenzpflichtig |
Credit: | Science Photo Library / Molloy, Cordelia |
Bildgröße: | 2304 px × 3456 px |
Modell-Rechte: | nicht erforderlich |
Eigentums-Rechte: | nicht erforderlich |
Restrictions: | - |