Tension of magnetic field of H – the vector physical quantity, result of a difference of a vector of magnetic induction and a vector of magnetization. In the SI system it is measured in amperes on meter, in SGS – in oersteds.
Instruction
1. If the particle electrically is loaded, around it the electric field operating on other particles is formed. And the charged particles moving electrically produce around themselves magnetic field. Both electric, and magnetic – making the uniform electromagnetic field. Magnetic field around permanent magnets is caused by the magnetic moments of electrons in atoms. Magnetic field – the special type of matter which is carrying out interaction between the moving charged bodies having the magnetic moment.
2. Magnetic induction of B – a vector, fundamental size, power characteristic of magnetic field. Let in some point of space there is q charge moving with v speed. Magnetic field affects it with is measured in teslas (T).
3. Magnetization of M – the vector characterizing a magnetic condition of a physical body. Is defined by the magnetic moment on substance unit of volume: M=m/V where m is a vector of the magnetic moment, V – the total amount of a body. Generally the magnetization is function of coordinates: M=dm/dV.
4. So, tension of magnetic field can be expressed as H=1/µ\• B-M, where µ - a magnetic constant. A magnetic constant – a constant – the scalar determining density of a magnetic flux in a vacuum. It is measured in newtons on ampere in a square (henry on meter). As it is a constant, it has constant numerical value: µ=4π\• 10^(-7)≈1,25663706•10^(-6) Gn/m. In a vacuum the tension and magnetic induction are connected by B=µequation \• H.