A transcranial magnetic stimulation (TMS) device creates very rapidly changing magnetic fields. The field near a typical pulsed-field TMS machine rises from 0 T to 2.5 T in 200 μs. Suppose a technician holds his hand near the device so that the axis of his 2.0-cm diameter wedding band is parallel to the field.
a) What emf is induced in the ring as the field changes?