how does the circuit in the machine work?what materials can a scrap heap magnet moove?what materials can‘t a scrap heap magnet moove?
It's a big electromagnet hung on a crane used to move scrap; turning on current attracts scrap to the magnet, turning current off lets the scrap drop
The circuit is just a solenoid (coil of wire) connected to a power supply. It works because when current flows through a wire, a magnetic field is induced. It can lift any magnetic material, mainly ferrous objects, but also some other metals.
