Magnetic flux
We also provide neodymium magnet ceramic magnet, alnico magnet, SmCo magnet, rubber magnet and magnetic product. These products are widely used in micro-motor, motor, computer, instrument, meter, automobile, motorcycle, horologe, office equipment, toy, magnetic therapy device and daily life industries.
Xiamen Everbeen Magnet Electron Co.,Ltd. http://www.china-magnet.net
Add:Unit H, 4F Rihua Mansion, No. 8 Xinfeng 2nd road, Torch Hi-Tech Zone, Xiamen, China.
Tel:0086-592-5781916
Fax:0086-592-5123653
E-mail:info@china-magnet.net
It¡¯s appropriate next to introduce another rather abstract concept, that of magneticflux, . The idea behind the term ¡°flux¡± is that the field of a magnetic pole isconveyed to a distant place by something which we call a flux. Rigorously the fluxis defined as the surface integral of the normal component of the magnetic field.
This means that the amount of flux passing through unit area perpendicular to thefield is equal to the field strength. So the field strength is equal to the amount offlux per unit area, and the flux is the field strength times the area,
The unit of flux in cgs units, the oersted cm2, is called the maxwell (Mx). In SIunits the expression for flux is = ¦Ì0HA (1.8)and the unit of flux is called the weber.Magnetic flux is important because a changing flux generates an electric currentin any circuit which it intersects. In fact we define an ¡°electromotive force¡± ¦Å, equal to the rate of change of the flux linked with the circuit.
Equation (1.9) is Faraday¡¯s law of electromagnetic induction. The electromotive force provides the potential difference which drives electric current around the circuit. The minus sign in Eq. (1.9) shows us that the current sets up a magnetic field which acts in the opposite direction to the magnetic flux. (This is known asLenz¡¯s law.)2
The phenomenon of electromagnetic induction leads us to an alternative definition of flux, which is (in SI units):A flux of 1 weber, when reduced to zero in 1 second, produces an electromotive force of 1 volt in a one-turn coil through which it passes.
We also provide neodymium magnet ceramic magnet, alnico magnet, SmCo magnet, rubber magnetand magnetic products. These products are widely used in micro-motor, motor, computer, instrument, meter, automobile, motorcycle, horologe, office equipment, toy, magnetic therapy device and daily life industries.
Xiamen Everbeen Magnet Electron Co.,Ltd. http://www.china-magnet.net
Add:Unit H, 4F Rihua Mansion, No. 8 Xinfeng 2nd road, Torch Hi-Tech Zone, Xiamen, China.
Tel:0086-592-5781916
Fax:0086-592-5123653
E-mail:info@china-magnet.net
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