Magnetic Calculator 2.0 ios官方版

The strength of the magnetic field was first derived from the magnetic charge view in history. In analogy with the Coulomb law of electric charge, two kinds of magnetic charge are considered, and the Coulomb law of magnetic charge is proposed. The force on the unit positive magnetic charge in a magnetic field is called the magnetic field strength H. Later, Ampere put forward the molecular current hypothesis, that there is no magnetic charge, the essence of magnetic phenomenon is molecular current. The strength of the magnetic field is indicated by the magnetic induction intensity B. However, in the magnetization problem of magnetic media, the magnetic field intensity H still plays an important role as an derived auxiliary quantity.