During a transcranial magnetic simulation (TMS) procedure, a magnetic field, typ

Question

During a transcranial magnetic simulation (TMS) procedure, a magnetic field, typically of magnitude 5.00 T, is produced in the brain using external coils. This is done by increasing the current in the coils from zero to its peak in about 80.0 mu s: since the magnetic field in the brain is proportional to the current, it too rises from zero to its peak in this time. If the magnetic field is uniform over a circular area of radius 1.00 times 10^-2 m inside the patient's brain, what is the resulting induced emf around this region of the brain? Induced emf

Explanation / Answer

induced emf, e = change in flux / time

= change in magnetic field * area/ time

= (5-0) *pi * (1*10-2)2 / 80*10-6

= 19.63 V

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