Hermann von Helmholtz , German physicist
said about ...
"Iron which is brought near a spiral of copper wire, traversed by an electrical current, becomes magnetic, and then attracts other pieces of iron, or a suitably placed steel magnet."
- Hermann von Helmholtz Read all Hermann von Helmholtz quotes, or find out more about Hermann von Helmholtz
"Iron which is brought near a spiral of copper wire, traversed by an electrical current, becomes magnetic, and then attracts other pieces of iron, or a suitably placed steel magnet."
- Hermann von Helmholtz
- Hermann von Helmholtz