K K Sharma Solutions for Chapter: Magnetism and Matter, Exercise 6: Magnetic Properties and magnetic Materials

A curve between magnetic moment and temperature, for a magnet, is,

The variation of magnetic susceptibility with magnetising field for a paramagnetic substance is,

The variation of magnetic susceptibility $\left(\chi \right)$ with absolute temperature $T$ for a ferromagnetic material is,

The relative permeability $\left({\mu }_r\right)$ of a ferromagnetic substance varies with temperature $\left(T\right)$ according to the curve,

The basic magnetization curve for a ferromagnetic material is shown in the figure. The value of relative permeability is highest for the point,

The space inside a toroid is filled with tungsten of susceptibility $6.8\times {10}^{-5}$. The percentage increase in the magnetic field will be,

The figure illustrates how the flux density $\left(B\right)$ inside a sample of unmagnetised ferromagnetic material varies with $B_o$, the magnetic flux density in which the sample is kept. For the sample to be suitable for making a permanent magnet,

For a ferromagnetic material, the relative permeability $\left({\mu }_r\right)$ versus magnetic intensity $\left(H\right)$ has the following shape: