One more simple use of an electromagnet?

Question

Im in grade 11, and i need one more practical use of an electromagnet. I already have tape eraser and door lock. Please name a few :)

Answer 1

the phone receiver and the door bell make use of an electromagnet. this is also used in areas full of junk to separate iron from the rest of the garbage.

Answer 2

Pick up scrap metal in a wrecking yard

A door bell