In 1820, a physicist noticed a compass twitch near a wire, and electromagnetism changed science

In the year 1820, a pivotal moment in science emerged when Danish physicist Hans Christian Ørsted made an astonishing observation. He noticed that when an electric current passed through a wire, it caused a nearby compass needle to deflect. This seemingly simple event uncovered a fundamental relationship between electricity and magnetism, laying the groundwork for modern physics.

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