A temporary magnet is a magnet that can only create its own magnetic field while in the presence of a stronger magnet or electric current. In other words, these types of magnets need assistance from a larger force in order to be able to attract other objects and magnets. Temporary magnets are made of soft metals that are magnetized only when exposed to a permanent magnetic field or an electric current. Common examples of temporary magnets include nails and paperclips, which can be picked up or moved by a strong magnet. Electromagnets are another type of temporary magnet that only retain magnetism when an electrical current is running through them. Electromagnets vary in strength and polarity and are composed of coil wire usually with an iron core. They are used in common objects such as doorbells and complex objects such as motors. Temporary magnets are versatile objects, but they are limited by the stronger magnetic field that they depend on in order to function.