Permanent magnets with diminished field strength can be recharged in at least three ways: by striking, stroking or stacking. Each of these methods entails lining up the weakened magnet with a stronger external field and using it to realign its particles.
Striking a magnet involves aligning the magnet with the Earth's magnetic north pole. Once aligned, the magnet can be forcibly struck with a hammer to shake its molecules into parallel lines. Stroking involves repeatedly running a strong magnet over the weakened magnet to pull its particles into alignment. Stacking strong magnets together with the weakened one, then clamping them together for a period of time, also strengthens the weak magnet's field.Learn More
To demagnetize a magnet, heat, hammer or jar the magnet, or use an alternating current field. Tools known as demagnetizers also exist that are used to demagnetize screws and steel tools. Magnetism is the result of alignment of magnetic dipoles in material in a direction.Full Answer >
A magnet can be demagnetized with heat, hammering or an electric current. A metal behaves as a magnet when all its units or domains are aligned in one direction. When this alignment is destroyed and made random, the magnetism is also destroyed.Full Answer >
A magnet is an object or material that can produce a magnetic field of its own. That magnetic field is responsible for the property of magnets to attract or repel other magnets, and pull objects that are ferromagnetic, like iron. Electrons are the reason behind the production of magnetic fields and magnetism. In permanent magnets, spinning of electrons creates the magnetism.Full Answer >
A magnet is made of any of a group of metals called ferromagnetic metals. Ferromagnetic metals contain many small magnetic fields called domains. In their natural state, the magnetic fields of these domains point in different directions. To create a magnet, the magnetic fields must align in the same direction.Full Answer >