Question

how many type of thinge had use magnets

Answer 1

Magnets are used to make a tight seal on the doors to refrigerators and freezers. They power speakers in stereos, earphones, and televisions. Magnets are used to store data in computers, and are important in scanning machines called MRIs (magnetic resonance imagers), which doctors use to look inside people's bodies.

Answer 2

many types of things are used by magnets like iron , nickel & Cobalt