A certain elastic conducting material is stretched into a circular loop. It is placed with its plane perpendicular to a uniform magnetic field B =0.8…

A certain elastic conducting material is stretched into a circular loop. It is placed with its plane perpendicular to a uniform magnetic field $\displaystyle \mathrm{B}=0.8 \mathrm{~T}$. When released the radius of the loop starts shrinking at a constant rate of $\displaystyle 2 \mathrm{cms}^{-1}$. The induced emf in the loop at an instant when the radius of the loop is $\displaystyle 10$ cm will be $\displaystyle \_\_\_\_$ mV.