show me how to do it please The figure below shows a set of modified Helmholtz c

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show me how to do it please

The figure below shows a set of modified Helmholtz coils. The radius of the coils is R = 35 cm and the separation of the two coils is D = 50 cm. Each coil has N = 75 turns. The current through the wire is I = 4 What is the magnitude of the magnetic field at the midway point O? (Image credit: The image is modified from the original image by Wikipedia, authored by Ansgar Hellwig. Weblink: http://en.wikipedia.0rg/wiki/File:Helmh0ltz_coils.png) The magnitude of the magnetic field is:

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