JEE Mains 12-Apr-2023 Shift 1 Solved Paper

A conducting circular loop is placed in a uniform magnetic field of 0.4T with its plane perpendicular to the field. Somehow, the radius of the loop starts expending at a constant rate of 1‌mm∕ s. The magnitude of induced emf in the loop at an instant when the radius of the lop is 2‌cm will be ________ µV.