Physics Question from JEE Main 2023 · 29 January, Shift 1

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