The term used to describe this measurement is known as magnetic flux. The measurement of the quantity of the magnetic force experienced by any object is measured by the magnetic lines of force entering and exiting it. The quality of magnetic property of such a magnet depends on the number of magnetic lines of force passing through this object that originate from the actual magnet. When a ferrous object is brought near a magnetic object then it also behaves like a magnet. These magnetic lines originate from the north pole of the magnets and end at the south pole of the magnet completing a closed circuit through the body of the magnet. The magnetic force of any normal magnet or an electromagnet can be represented by magnetic lines. The north pole and south pole of this type of magnet can be easily identified by the use of a compass. And if the wire is turned in a form of spring or selenium and electric current is passed through it then the spring behaves like an actual magnet. In later days it also has been discovered that the electric when passing through a metal wire also possesses characteristics of magnetism in it. One pole is known as the north pole and the other is the south pole. Later when the characteristics of a magnet were discovered it was found that in the magnet there exist two poles at both ends. Chromium and Nickel are the other two objects that are attracted to magnets. It is a material that attracts iron or ferrous objects. Magnetic Properties of Electricity flowing through a WireĪs a child, you must all have played with a magnet. When the coil is rotated between the pole pieces of a magnet as shown, during one complete rotation of the coil, how often will the magnetic flux linked with the coil be maximum and minimum? Mathematically, the magnetic flux formula is as follows: Magnetic flux is denoted by ΦB where B represents magnetic field, and its unit is tesla-meter2 or weber (Wb). It is calculated as the product of the average magnetic field strength and the perpendicular area it penetrates. Magnetic flux refers to the total number of magnetic field lines penetrating any surface placed perpendicular to the magnetic field. The magnetic flux value could be a vector quantity that depends on the flux direction. Magnetic flux is represented by the symbol B, where B could be a field and therefore the unit is Weber (Wb). This demonstration is common in school science classes.It's the component of the flux that passes through the coil that's shared by all. If you place iron filings on a sheet of paper and place the paper on a magnet so both magnetic poles are near the paper, the filings line up in a pattern resembling illustration C. But they can be observed indirectly, and they produce demonstrable effects. As the distance from the line connecting the poles increases, the flux density decreases.įlux lines are intangible they cannot be seen. The flux density is considerable along and near a line connecting the poles. ![]() The flux density is greatest near the poles. In a magnetic field between opposite poles, the flux lines have the same general shape and orientation, so this drawing also applies to that situation. Magnetic flux density is inversely proportional to the distance from a current-carrying conductor, as measured in a plane perpendicular to the conductor.ĭrawing C shows the general orientation of the lines of flux of an electrostatic field between two oppositely charged poles in a plane containing the centers of both poles. As with the flux surrounding an electrically charged object, the separation between the flux lines increases as the distance from the conductor increases. Electrostatic flux density is inversely proportional to the distance from the charge center.ĭrawing B illustrates flux lines surrounding a current-carrying conductor as they appear in a plane perpendicular to the conductor. The flux density, and hence the electrostatic field strength, decreases as the distance from the charged object increases. ![]() The intensity of the field is inversely proportional to the separation between the lines of flux. Three examples of flux lines are shown in the illustration.ĭrawing A shows the geometric orientation of the lines of flux in the vicinity of an electrically charged object. Flux is depicted as "lines" in a plane that contains or intersects electric charge poles or magnetic poles. In electronics, the term applies to any electrostatic field and any magnetic field. Flux is the presence of a force field in a specified physical medium, or the flow of energy through a surface.
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