Physics - Current Electricity Question with Solution | TestHub

The current flowing through the disc (Annular Disc $\left({\mathrm{R}}_1\gg \mathrm{t},{\mathrm{R}}_2\gg \mathrm{t}\right)$ ), when a voltage of ${\mathrm{V}}_0$ is applied across AB is $\mathrm{I}=\frac{{\mathrm{V}}_0\mathrm{xt}}{{\rho }_0\ln \left(\frac{{\mathrm{R}}_2}{{\mathrm{R}}_1}\right)}$. Find x. Resistivity of Disc changes with polar angle $\varphi$ according to $\rho ={\rho }_0|\sec \varphi |$.