![]() The Tesla is a huge unit, with a 1 T magnetic field being quite large. The SI unit of magnetic field is the Tesla (T) in honor of physicist Nikola Tesla, with units of N/ A These electric fields that come from changing magnetic fields are how electric generators can create electric current.Ī magnetic field is a vector field, meaning it has a specified magnitude and direction at any point. ![]() In one of the most beautiful examples of symmetry in physics, changing magnetic fields create electric fields. Magnetic fields are produced by changing electric fields, usually through moving charges such as electrons, often in the form of a macroscopic electric current (like the current in a wire) or a microscopic current (such as in an atomic orbit). ![]() ![]() Figure 1: Magnetic field lines from a bar magnet visualized using iron filings. ![]()
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