Knowledge Universe on Instagram: "The ability of a giant industrial magnet to lift thousands of pounds of scrap metal effortlessly is a practical application of electromagnetic induction. Unlike the permanent magnets on your fridge, these are electromagnets. They consist of a massive coil of wire-usually copper or aluminum-wrapped around a heavy iron core. When a high-voltage electric current flows through this coil, it creates a powerful magnetic field that aligns the domains of the iron core,