A circle with a radius of 0.4 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 6 Ohms. The initial magnetic field
is 0.6 Tesla. The magnetic field is then changed in 0.7 s and the
average induced current is 0.03 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 direction) is held
constant at the value of the final magnetic field that was just
found. Then, the wire is reshaped into a square that is wound once
in a time of 0.006 seconds. If the resistance does not change, what
is the average induced current, in amps, when the wire changes
shape? If it's clockwise include a negative sign.
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