Question: Approximating a neuron by a straight wire, what electric current is needed to produce a magnetic field of 1.0 * 10-15 T at a distance

Approximating a neuron by a straight wire, what electric current is needed to produce a magnetic field of 1.0 * 10-15 T at a distance of 5.0 cm?

A. 4.0 × 10-22 A

B. 7.9 × 10-11 A

C. 2.5 × 10-10 A

D. 1.0 × 10-7 A

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