Answer:
Explanation:
Michael Faraday discovered this during one of his experiments. He found that a change in the magnetic flux of one object induced an electric current in another. This fact was found experimentally, and not theoretically. Faraday found this by holding a compass up to a coil. When the magnetic field was changed, the compass needle sharply moved to the left or right depending on the direction of the current in the coil. This showed that a changing magnetic field, induces an electric current in the needle.
The idea of an electric current producing a magnetic field is proven in multiple different ways. Magnetism is due to charges in motion, which current is defined as the movement of charges over time. So, it only makes sense that a current produces a magnetic field. We can experimentally prove this by running a current through a solenoidal coil. The current inside the coil will produce a magnetic field. We can see the magnetic field by pouring iron filings onto the coil. A large majority of the iron pieces will be attracted to the coil, which is where the magnetic field is theoretically thought to be.
