What is the key feature of induced magnets?

Induced magnets are materials that become magnetic when they are placed within an external magnetic field. The key feature of these induced magnets is that they lose their magnetism once the external magnetic field is removed. This property distinguishes them from permanent magnets, which maintain their magnetic properties regardless of external influences.

When an external magnetic field is applied, the domains within an induced magnet align in the direction of the field, causing the material to exhibit magnetism. However, when the external magnetic source is taken away, the alignment of these domains is no longer maintained, and the material loses its magnetic properties. This temporary nature of magnetism is fundamental to understanding how induced magnets work and is critical in applications where controlled magnetism is necessary.

Other options suggest characteristics that do not apply to induced magnets, such as being permanent or stable at high temperatures, which are attributes associated with permanent magnets or specific types of materials, rather than being a defining feature of induced magnetism. Additionally, only certain types of magnets can generate electric current, which is not inherently a feature of induced magnets themselves.