MY NOTES
ASK YOUR TEACHER
PRACTICE ANOTHER
An MRI technician moves his hand from a region of very low magnetic field strength into an MRI scanner's 2.50 T field with his fingers pointing in the
direction of the field. His wedding ring has a diameter of 2.17 cm, and it takes 0.400 s to move it into
the field.
(a) What average current is induced in the ring if its resistance is 0.0100 0? (Enter the magnitude in amperes.)
8.58E-4 X A
(b) What average power is dissipated (in W)?
-7.88
X w
(c) What average magnetic field is induced at the center of the ring? (Enter the magnitude in teslas.)
7.88
XT
relative to the MRI's field?