To see why an MRI utilizes Iron to increase the magnetic field created by a coil, calculate the current in amperes needed in a 380 -loop-per-meter circular coil 0.660 m in radius to create a 1.05 T field (typical of an MRI instrument) at its center with no iron present. A The magnetic field of a proton is approximately like that of a circular current loop
0.650\times 10^(-15)m
in radius carrying
1.05\times 10^(4)A
. What is the field in teslas at the center of such a loop?
?
T