Transcranial magnetic stimulation (TMS) is a noninvasive technique used to stimu

Question

Transcranial magnetic stimulation (TMS) is a noninvasive technique used to stimulate regions of the human brain. A small coil is placed on the scalp, and a brief burst of current in the coil produces a rapidly changing magnetic field inside the brain. The induced emf can be sufficient to stimulate neuronal activity. One such device generates a magnetic field within the brain that rises from zero to 1.7 T in 100 ms. Determine the magnitude of the induced emf within a circle of tissue of radius 1.5 mm and that is perpendicular to the direction of the field.

mv=

Explanation / Answer

Given Data

A=.0015 m^2

B=1.7T

t=.1

:  Induced emf

= -d/dt = BA/t = BR²/t

= (1.7)(3.14)(0.0015)² / (0.1)

=1.20 x10^-4 volts

Related Questions

Navigate

• Browse (All)
• Browse T
• Subjects

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.