Weber, << VAY buhr or WEE buhr, >> is a unit used to measure a magnetic field. A magnetic field is the influence that a magnet or electric current creates in the region around it. You can picture a magnetic field by placing a sheet of paper on a bar magnet and sprinkling iron filings on the paper. The filings will line up to make loops, called magnetic field lines, that connect the poles of the magnet. The magnetic field is strong where the field lines are close together, as they are near the poles.
The weber measures magnetic flux, a quantity related to the number of magnetic field lines passing through an area that is perpendicular to the field. The more field lines that pass through a given area, the stronger the field. The total flux divided by the area gives the field strength, measured in a unit called the tesla. If the flux is 1 weber for every square meter of area, the magnetic field strength is 1 tesla.
The weber was named for the German physicist Wilhelm Weber. Its symbol is Wb.
