JEE Advanced 2020 Concept Recapitulation Test 3 Paper 1

An infinitesimally small bar magnet of dipole moment M=1A−m2 is pointing and moving with the speed v=1m∕s in the x -direction. A small closed circular conducting loop of radius a=1cm and of negligible self-inductance lies in the y−z plane with its centre at x=0, and its axis coinciding with the x -axis. The force opposing the motion of the magnet when x=1m is found to be 4y×10−22N. The resistance of the loop R=10Ω. Find the value of y.