College Physics
College Physics
11th Edition
ISBN: 9781305952300
Author: Raymond A. Serway, Chris Vuille
Publisher: Cengage Learning
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BIO Transcranial Magnetic Stimulation Transcranial magnetic stimulation (TMS) is a noninvasive method for studying brain function, and possibly for treatment as well. In this technique, a conducting loop is held near a person's head, as shown in the figure.(Figure 1) When the current in the loop is changed rapidly, the magnetic field it creates can change at the rate of 3.00×104 T/s. This rapidly changing magnetic field induces an electric current in a restricted region of the brain that can cause a finger to twitch, bright spots to appear in the visual field (magnetophosphenes), or a feeling of complete happiness to overwhelm a person.

If the magnetic field changes at the previously mentioned rate over an area of 1.18×10−2 m2 , what is the induced emf?
 
Wire coil
Magnetic
field lines
Scalp
Induced electric
current
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Transcribed Image Text:Wire coil Magnetic field lines Scalp Induced electric current
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