1. electromagnetism在线翻译
1. It was introduced as an electromagnetic telegraph that could transmit encoded text messages over wire by applying the principle of electromagnetism.
2. Einstein hoped to unite the forces of gravity and electromagnetism under one theoretical framework.
noun
1. the branch of physics concerned with electromagnetic phenomena
Synonym: electromagnetics
2. magnetism produced by an electric current
e.g. electromagnetism was discovered when it was observed that a copper wire carrying an electric current can magnetize pieces of iron or steel near it