acom.acadia 9 Backpack MATH 1023 www.webassign.net/web /Assignment-Responses t?d
ID: 1266007 • Letter: A
Question
acom.acadia 9 Backpack MATH 1023 www.webassign.net/web /Assignment-Responses t?dep 11217670 Transcranial magnetic stimulation (TMS) is a noninvasive technique used to stimulate regions of the human train (see fiqure). In TMS, a small coll is placed on the scalp and a brief burst of current in the coi produces a rapidy changing magnetic field inside the brain. The induced emf can stimulate neuronal activity (a) One such device generates an upward magnetic field within the brain that tises from zero to 1.30 T in 135 ms. Determine the induced emf around a horlzontal cirde of tissue of radus 1.90 magnitude drection clochise as seen from above tb) The field next changes to 0.500 T downward in 65.0 ms How does the ent induced in this process compare with that in part (a)? drection Seled- as seen from above Need Help?Explanation / Answer
induced emf is defiend as the rate of change of magnetic flux
in mathematical form,
induced emf e = NAdB/dt or NABW or NA dB/dt cos theta
where A = area = pi r^2
N = no. of tunrs
W = angular frequency
dB/dt = rate of change of magnetic field
so emf e = 1* 3.14 * 1.9 e-3 *1.9 e-3 * 1.5)/(0.135 *4)
emf e = 31.48 uV ------------<<<<<<<<<<<<Answer
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emf e = 1* 3.14 * 1.9 e-3 *1.9 e-3 * (1.5-0.5)/(0.65*4)
emf e = 4.36 uV
upward direction
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