Define the term magnetic susceptibility and write its relation in terms of relative magnetic permeability.
a) Magnetic susceptibility measures the degree of magnetization of a material in response to an applied magnetic field. It is related to relative magnetic permeability as χ = μᵣ - 1.
b) Magnetic susceptibility measures the applied magnetic field's strength in a material. It is related to relative magnetic permeability as χ = μᵣ + 1.
c) Magnetic susceptibility measures the material's resistance to magnetic fields. It is related to relative magnetic permeability as χ = μᵣ / 2.
d) Magnetic susceptibility measures the magnetic field's direction in a material. It is related to relative magnetic permeability as χ = 2μᵣ.