Steady Magnetic Field

By denoting the surface current density as K (in amp/m) and volume current density as J (in amp/m²) we can write:

......................................(4.2)

( It may be noted that )

Employing Biot-Savart Law, we can now express the magnetic field intensity H. In terms of these current distributions.

    ............................. for line current............................(4.3a)

     ........................ for surface current ....................(4.3b)

....................... for volume current......................(4.3c)