A circle with a radius of 0.3 meters is placed in the x-y plane
in a magnetic field directed in the -z direction. It is wound once
and its resistance is 8 Ohms. The initial magnetic field is 0.5
Tesla. The magnetic field is then changed in 0.7 s and the average
induced current is 0.05 amps running counter-clockwise. First, find
the final magnetic field to needed to induce this average
current.
Then, the magnetic field (still in the -z...