Electromagnetic Induction

A long solenoid of radius a and number of turns per unit length \(n\) is enclosed by cylindrical shell of radius R, thickness \(d\) \((d < < R)\) and length L. A variable current \(\mathrm{I}=\mathrm{I}_{0} \sin \omega t\) flows through the coil. If the resistivity of the material of cylindrical shell is \(\mathrm{P}\), find the induced current in the shell.