Which statement explains why the paper clip falls away when the external magnet is removed in the nail-paper clip scenario?

Which statement explains why the paper clip falls away when the external magnet is removed in the nail-paper clip scenario?

• A. The nail stops being magnetized once the external magnet is removed
• B. The nail becomes a permanent magnet
• C. The paper clip magnetic strength increases
• D. The paper clip loses magnetic properties

Answer: (A)

Temporary magnetization is produced when a ferromagnetic material is in an external magnetic field. In this setup, the external magnet aligns the nail’s magnetic domains, turning the nail into a magnet that attracts the paper clip. When the external magnet is removed, the nail’s domains return to their random orientations if it’s not a permanent magnet, so the nail loses its magnetic field and the paper clip is no longer pulled toward it. That’s why the paper clip falls away. The other ideas—becoming a permanent magnet, the paper clip gaining magnetic strength, or the paper clip retaining magnetic properties—don’t fit the situation since the magnetization depends on the external field and is not transferred to the paper clip in this scenario.

Temporary magnetization is produced when a ferromagnetic material is in an external magnetic field. In this setup, the external magnet aligns the nail’s magnetic domains, turning the nail into a magnet that attracts the paper clip. When the external magnet is removed, the nail’s domains return to their random orientations if it’s not a permanent magnet, so the nail loses its magnetic field and the paper clip is no longer pulled toward it. That’s why the paper clip falls away. The other ideas—becoming a permanent magnet, the paper clip gaining magnetic strength, or the paper clip retaining magnetic properties—don’t fit the situation since the magnetization depends on the external field and is not transferred to the paper clip in this scenario.