Electromagnets are intriguing devices that create a magnetic field using electricity and do not always exhibit magnetic properties. These types of magnets function by running a current from some source of electricity through a wire. This simple process can create a magnetic field around another coiled wire, which causes the electromagnet to exhibit the desired behavior and properties as though it has been magnetized.Know More
Electromagnets are unique because they have the ability to be turned on and off. This is done by breaking or completing the circuit that gives the electromagnet its magnetic properties. For this reason, they are often used in different industrial settings that require the movement of large metal objects, such as junkyards.
Electromagnets use a very simple property: tightly coiled wire around a piece of metal that creates a magnetic field if exposed to a current. Usually, the wire wrapped around this metal is copper. By themselves, these parts do not exhibit magnetic properties. However, once they have been introduced to a source of energy, usually from a battery, the magnetic properties activate fully. As long as there is a flow of current running through the wire, it will continue to maintain an electromagnetic field.Learn more about Magnetism
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 >
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 >
Gyroscopic compasses are used aboard transportation such as ships and airplanes. Spinning gyroscopes copy the behavior of a magnetic compass by using a magnetic compass as a reference. A motor keeps the gyroscope spinning, so it continues to point true north despite movement of the frame. A gyroscope adjusts itself quickly even in turbulence and rough seas.Full Answer >
A Hall probe is a sophisticated instrument used to measure magnetic field strength. It is a thin film that measures the transverse voltage when it is placed in the magnetic field. The Hall probe works on the Hall effect that was discovered by the scientist E.H. Hall in 1879.Full Answer >