Exercise

The magnetic flux through each of five faces of a die (singular of dice) is given by ${\Phi }_{\mathrm{B}}=\pm 2N \mathrm{Wb}$, where $N(=1$ to $5)$ is the number of spots on the face. The flux is positive (outwards) for $N$ even and negative (inward) for $N$ odd. What is the flux through the sixth face of the die?

State Gauss' law for magnetism.

State Gauss's law for magnetism.

A Gaussian surface in the shape of a right circular cylinder with end caps has a radius of $5.60 \mathrm{cm}$  and a length of $80.0 \mathrm{cm}$ . Through one end there is an inward magnetic flux of $25.0 \mathrm{\mu Wb}$. At the other end there is a uniform magnetic field of$1.60 \mathrm{mT}$ , normal to the surface and directed outward. What are the $\left(a\right)$ magnitude and $\left(b\right)$ direction (inward or outward) of the net magnetic flux through the curved surface?

Describe the atomic model of magnetism. Explain magnetisation and demagnetisation of an iron rod on the basis of atomic model.

What is paramagnetism ? Explain it on the basis of electron theory.

Explain the terms magnetisation, magnetising field intensity, permeability relative permeability and magnetic susceptibility Write the relation between permeability and susceptibility.

Distinguish between dia, para and ferro magnetic materials on the basis of relative permeability and magnetic susceptibility. Define intensity of magnetisation and magnetic intensity.