Neurons in our bodies carry weak currents that produce
Chapter 19, Problem 19.78(choose chapter or problem)
Neurons in our bodies carry weak currents that produce detectable magnetic fi elds. A technique called magnetoencephalography, or MEG, is used to study electrical activity in the brain using this concept. This technique is capable of detecting magnetic fi elds as weak as 1.0 _ 10_15 T. Model the neuron as a long wire carrying a current and fi nd the current it must carry to produce a fi eld of this magnitude at a distance of 4.0 cm from the neuron.
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