Homework answers / question archive / A loop of wire of radius a = 25mm has an electrical resistance R = 0

A loop of wire of radius a = 25mm has an electrical resistance R = 0

Physics

Share With

A loop of wire of radius a = 25mm has an electrical resistance R = 0.039\Omega . The loop is initially inside a uniform magnetic field of magnitude B_0 = 1.9T parallel to the loop's axis. The magnetic field is then reduced slowly at a constant rate, which induces a current I = 0.20A in the loop. How long does it take for the magnitude of the uniform magnetic field to drop from 1.9T to zero? Find the time Deltat it takes the magnetic field to drop to zero.