Tony uses the device shown in the diagram to model how an electromagnet is used in his uncle’s scrap metal yard.
not sure how to get the diagram - a battery held up by a nail with coiled wire
after picking up several staples with the device, what change would enable tony to drop the staples in the scrap metal bin?
1. removing the
2. removing the iron
3. moving the wire loops closer
4. spreading the wire loops farther