Earth is like a giant magnet in several ways. Not only does it have a magnetic north and south pole that act similarly to the poles on bar magnets, but the planet is surrounded by a strong magnetic field, which is electrically charged and able to interact with magnetized matter.Know More
The Earth's magnetism is a direct result of a process called the dynamo effect. In the dynamo effect, the Earth's solid core transfers heat through the molten outer core and up to the surface of the planet via convection, according to Why Do. This causes the liquid part of the core to move, which results in an electrical current. The movement of the Earth as it orbits and spins keeps the liquid core, which is made up of primarily iron and nickel, in constant motion as well. This is why the magnetic force never falters or gets weaker.
Interestingly, most planets and moons are not as magnetic as Earth, which makes the planet unique and interesting in many ways. In fact, most heavenly bodies have very little or no magnetic properties. This is just one of the ways that the planet Earth stands out among the planets, moons and stars in the solar system.Learn More
To demagnetize a magnet, cause disorder to the unit magnets within the magnetic material. Strike the magnet first with a hammer, heat it strongly, and then subject it to AC current to eliminate magnetic ability completely.Full Answer >
A magnet will not stick to titanium. Using a magnet is a common method of determining if a metal that's being sold as titanium is actually titanium.Full Answer >
Magnets are made from magnetic materials, or metals that are attracted to a magnet and can be magnetized. They come from metal elements or alloys. Magnets are capable of producing magnetic fields, and they attract metals such as cobalt, iron and nickel.Full Answer >
The NDT Resource Center describes exposing a magnet to a reversing and decreasing magnetic field as one way to remove its magnetic properties. This is not the most effective method of demagnetizing a magnet, but it is far simpler to perform than the most effective method, which involves heating the magnetic material to a high temperature. Exposing a magnet to a reversing magnetic field demagnetizes it almost completely.Full Answer >