Magnetic field strength

A magnetic field is a force field that is created by moving electric charges (electric currents) and magnetic dipoles, and exerts a force on other nearby moving charges and magnetic dipoles. At any given point, it has a direction and a magnitude (or strength ), so it is represented by a vector field. The term is used for two distinct . It has been common practice to define another magnetic field quantity, usually called the magnetic field strength designated . It is sometimes also called the magnetic fiel but the symbol H is unambiguous. Magnetic field strength : …field H is called the magnetic intensity an like M, is measured in units of amperes per metre.

Usually given the symbol H. Measured in teslas (or microteslas or gauss). The magnetic flux density. In electromagnetism theory, it is absolutely clear that these are . Magnetic field is a vector field in space, and is a kind of energy whose full quantification requires the knowledge of the vector fields of both magnetic field strength H and flux density B (or values correlated with them).

In vacuum, at each point the H and B vectors are oriented along the same direction and are . Visualizing magnetic field strength - Duration: 3:35. Define magnetic field strength. English dictionary definition of magnetic field strength. T scanner is considered high field compared with other imaging devices, this field strength is actually mid-range when judged against other experimental and commercial applications of magnets.

A junkyard magnet might be almost as powerful (about T), but a refrigerator magnet is several hundred times . When describing the magnetic field of the Earth we must specify both the direction and the intensity of the field. Since both of these change, and change differently in different places, it is not easy to say how the field of the Earth as . The relation between Magnetic strength H and flux density B can be defined by B = μH. In the air, μis usually about except special case, and Gauss ≒ Oersted.

Coercive field strength Hc describes the force that is necessary to completely demagnetise a magnet. Simply said: the higher this number is, the better a magnet retains its magnetism when exposed to an opposing magnetic field. There are differences between the coercive field strength bHc of flux density and the coercive . This is called a uniform field. Field strength remains constant as you move around this area. Move out from the space between the poles and the field strength reduces.

The lines of flux become further apart. Temporary Magnets: Around any conductor that has a current flowing through it there is a magnetic field. See how a wire carrying a current creates a magnetic field.

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