Magnetism and Matter

Permeability has an MKS unit of
A metallic block carrying current I is subjected to a uniform magnetic induction $$\vec{B}$$ as shown in the figure. The moving charges experience a force $$\vec{F}$$ given by _________ which results in the lowering of the potential of the face ________. Assume the speed of the carriers to be v.

Earth's magnetic field always has a horizontal component except at

A dipole of magnetic moment $$2\ A-m^{2}$$ is deflected through $$30^{o}$$ from magnetic meridian. If magnetic field strength of Earth's horizontal component is $$H=30\ A/m$$, the deflecting couple is
In the hysteresis cycle, the value of $$H$$ needed to make the intensity of magnetism zero is called