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$\mathrm{S}$ is the surface of a lump of magnetic material.
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The correct answers are:
Lines of B are necessarily continuous across $\mathrm{S}$
,
Lines of $\mathrm{H}$ cannot all be continuous across $\mathrm{S}$
Lines of B are necessarily continuous across $\mathrm{S}$
,
Lines of $\mathrm{H}$ cannot all be continuous across $\mathrm{S}$
As we know that, the magnetic intensity $(\mathrm{H})$ outside any magnet is $\mathrm{H}=\mathrm{B} / \mu_0$
For inside the magnet $\mathrm{H}=\mathrm{B} / \mu_0 \mu_{\mathrm{r}}$ where $\mu_{\mathrm{r}}$ is the relative permeability of material.
Magnetic field lines for magnetic induction (B) form continuous lines so, lines of $\mathrm{B}$ are necessarily continuous across S.
Also, magnetic intensity $(\mathrm{H})$ to magnetise varies for inside and outside the lump. So, lines of Hcannot all be continuous across S.
For inside the magnet $\mathrm{H}=\mathrm{B} / \mu_0 \mu_{\mathrm{r}}$ where $\mu_{\mathrm{r}}$ is the relative permeability of material.
Magnetic field lines for magnetic induction (B) form continuous lines so, lines of $\mathrm{B}$ are necessarily continuous across S.
Also, magnetic intensity $(\mathrm{H})$ to magnetise varies for inside and outside the lump. So, lines of Hcannot all be continuous across S.
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