A material is placed in magnetic field intensity \(\vec{H} \) . As a result, bound current density \(\vec{J}_b \) is induced and magnetization of the material is \(\vec{M} \). The magnetic flux density is \(\vec{B}. \) Chooce the correct options valid at the surface of the material.
a) \(\vec{\nabla} \cdot \vec{M} =0 \) .
b) \(\vec{\nabla} \cdot \vec{B} =0 \) .
c) \(\vec{\nabla} \cdot \vec{H} =0 \) .
d) \(\vec{\nabla} \cdot \vec{J}_b =0 \) .
1
a,d
2
b,c
3
c,a
4
b,d