A circular loop of radius 7 cm is placed in uniform magnetic field of 0.2 T directed perpendicular to plane of loop. The loop is converted into a…

A circular loop of radius $\displaystyle 7$ cm is placed in uniform magnetic field of $\displaystyle 0.2$ T directed perpendicular to plane of loop. The loop is converted into a square loop in $\displaystyle 0.5$ s. The EMF induced in the loop is $\displaystyle \_\_\_\_$ mV.