Magnetoencephalography (MEG) is a noninvasive method for studying electrical act

Question

Magnetoencephalography (MEG) is a noninvasive method for studying electrical activity in the brain. It is based on the principle that an electric current creates a magnetic field, whether the current is in a wire or in the neurons of a brain. Thus, your very thoughts at this moment are generating measurable magnetic fields outside your head. With today's technology, an MEG can detect magnetic fields as small as 1.48E-15 T. Approximating a neuron by a straight wire, what electric current is needed to produce this magnetic field strength at a distance of 6.43 cm?

Explanation / Answer

B=(uI)/{2(pi)r}..................................................................................................................................................................... u=4(pi)*10^-7........................................................................................................................................................................ I={B*2(pi)r}/u=(1.2*10^-15*2*3.147*0.004)/(4*3.147*10^-7).................................................................. I= 2.4* 10^-11A=2.4E-11A Happy To Help..:)

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