A loop of wire of radius aaa = 30. mmmm has an electrical resistance RRR = 0.039 ΩΩ . The loop is initially inside a uniform magnetic field of magnitude B0B0B_0 = 1.2 TT parallel to the loop's axis. The magnetic field is then reduced slowly at a constant rate, which induces a current III = 0.20 AA in the loop. How long does it take for the magnitude of the uniform magnetic field to drop from 1.2 TT to zero? Find the time ΔtΔtDeltat it takes the magnetic field to drop to zero.

A loop of wire of radius aaa = 30. mmmm has an electrical resistance RRR = 0.039 ΩΩ . The loop is initially inside a uniform magnetic field of magnitude B0B0B_0 = 1.2 TT parallel to the loop's axis. The magnetic field is then reduced slowly at a constant rate, which induces a current III = 0.20 AA in the loop. How long does it take for the magnitude of the uniform magnetic field to drop from 1.2 TT to zero? Find the time ΔtΔtDeltat it takes the magnetic field to drop to zero.