Definitions and Units of Measurementīefore we start talking about magnetic flux, we have to talk about the two vector fields that describe the magnetic field. Magnetic fields can be further visualized by using iron filings or magnetic field viewing film. The strength of the field is visualized by the spaces between the magnetic flux lines. Magnetic fields are usually visualized by magnetic flux lines. The magnetic field is a vector field because it can be specified by both direction and magnitude. The Earth produces its own geomagnetic field that extends from the Earth’s interior into space and is used for navigation and protects us from the deadly solar wind.īulky horseshoe magnets made from Alnico were used in magnetrons before the development of much less bulky ferrite and rare earth magnetsĪ magnetic field is a region around a permanent magnet or a moving electric charge within which there is a magnetic force acting on moving electric charges and ferromagnetic materials. We are surrounded by magnetic and electromagnetic fields. This includes transformers, electric motors and generators, various drives, electromagnetic clutches and brakes, antennas, and waveguides.
Don’t forget about a lot of stuff that works using magnetic and electromagnetic fields. Many smartphone cases use a magnet in their cover to control the smartphone: the phone can sense an open cover and display a lock screen or clock screen. They are on your fridge, in your fridge, in your computers, tablets, and smartphones, in electric motors, in your ears (neodymium magnets in earbuds and magnetic earrings), in various electric motors in cars, trucks, DVD players, and computer hard drives.
However, before the middle of the 20th century, there were only a few magnets in our homes - a magnet in a loudspeaker of a radio receiver, telephone, and probably several cabinet magnetic latches. A magnet in a smartphone speaker can be found in the pocket of every person. We are surrounded by magnets in our daily life more than ever.
0 kommentar(er)
