magnetism produced by an electric current;
"electromagnetism was discovered when it was observed that a copper wire carrying an electric current can magnetize pieces of iron or steel near it"
the branch of physics concerned with electromagnetic phenomena
- He wrote his doctoral thesis on electromagnetism.
- Such magnetism, because it is electrically produced, is called electromagnetism.
- This interplay between mechanics and electromagnetism is less evident.
- electromagnetics 电磁学