Relationship Between B And H Field

If the magnetisation current i is increased in a positive direction to some value the magnetic field strength h increases linearly with i and the flux.

Relationship between b and h field.

In diamagnets and paramagnets the relation is usually linear. The magnetic hysteresis loop above shows the behaviour of a ferromagnetic core graphically as the relationship between b and h is non linear. The vacuum permeability μ 0 is by definition 4π 10 7 v s a m. Where χ is called the volume magnetic susceptibility and.

Based on maxwell s equations electric fields are generated by changing b fields while h fields are generated by changing electric fields. The quantity m in these relationships is called the magnetization of the material. A relation between m and h exists in many materials. There are two different but closely related fields which are both sometimes called the magnetic field written b and h.

B μ 0 h m h and m will have the same units amperes meter. A static b field actually d dt b n da 0 cannot produce an electric field e. The names and units of the six electromagnetic flelds. The fields h and b as in the electric case we have two flelds in the mag netic case.

Starting with an unmagnetised core both b and h will be at zero point 0 on the magnetisation curve. The quantity h plays the role of d for the table i. Symbol name units e electric field v m n c p polarization c m2 d electric displacement c m2 b magnetic induction n a m. Electric current can be highly non linear.

Another commonly used form for the relationship between b and h is. Even if we used natural units where μ. While both the best names for these fields and exact interpretation of what these fields represent has been the subject of long running debate there is wide agreement about how the underlying physics work. In dc fields static electric e fields create currents magnetization currents i when σ 0 which in turn produce static h fields.

Thus b is related to the properties of the material and its relation to the applied excitation e g. B μ m h. Begingroup h is a bit like the number of magnetic field lines and b kinda is how tightly packed they are. Bio savart law gives us b which i suppose is magnetic field.

The magnetization defines the auxiliary magnetic field h as gaussian units which is convenient for various calculations. E d p b h and m. Historically the term magnetic field was reserved for h while. To further distinguish b from h b is sometimes called the magnetic flux density or the magnetic induction.