NATS 1945 Chapter Notes - Chapter 6: Magnet, Solenoid, Electrical Network
9 Nov 2017
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Electromagnet: an object in which magnetism is induced by the electric field from a nearby current. Therefore, electric currents can be used to create magnets, really strong electric currents can be used to create really strong magnets. B is the symbol for a magnetic field. If you hook up a wire to a battery and you wrap the wire around an iron nail, the nail instantly becomes a magnet when current flows through the wire. When a magnet is created using an electric curre(cid:374)t, (cid:449)e call that a(cid:374) electro(cid:373)ag(cid:374)et. Em are at the core of cou(cid:374)tless tech"s. Hard drives store their data using magnetic fields and these fields can be tampered with, by other magnets. In order to wipe out a hd at the distance that they attempted and through the wall of a truck, it would take 5 million amps of current, only lightning bolts produce currents that high.
