Tony uses the device shown in the diagram to model how an electromagnet is used in his uncle's scrap metal yard. After picking up several staples with the device, what change would enable Tony to drop the staples in the scrap metal bin?

Removing the battery

removing the iron nail

moving the wire loops closer together

spreading the wire loops farther apart

An electromagnet is a device which uses a current and passes this through a conductor. The current induces a magnetic field in the conductor, making the conductor a magnet. In order to remove the effects of this magnetism, the device may have its electrical power cut off. Therefore, the way to drop the staples in the bin would be to remove the battery.