A conducting ring of radius $'r$' is placed in a varying magnetic field perpendicular to the plane of the ring, the rate at which magnetic field varies is $x$ the electric field intensity at any point of the ring is
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$\oint \mathrm{E.d} \ell=\frac{\mathrm{d} \phi_{\mathrm{B}}}{\mathrm{dt}}$
$E$. $2 \pi r=\pi r^{2} \frac{d B}{d t}$
$\mathrm{E} .2 \pi \mathrm{r}=\pi \mathrm{r}^{2} \mathrm{x}$
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