@explains._everything on Instagram: "This is electromagnetism — one of the four fundamental forces of the universe. . . 🌌When electric current flows through a wire, it creates a magnetic field around it. Wrap that wire into a coil, and the field strengthens — turning electricity into magnetism. Add an iron core inside, and you get an electromagnet powerful enough to lift cars or move train tracks. . . That same principle powers everything from your phone’s speakers and motors to MRI machines an