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Statement of a problem № 3830

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Helmholtz coils consist of a pair of loops each with N turns and radius R. They are placed coaxially at distance R and the same current I flows through the loops but in the opposite sense. Show that the magnetic field at P, midway between the centres A and C, Fig. 13.11, is given by B=8Nn0I/5^(3/2)R

Solution:
Helmholtz coils consist of a pair of loops each with N turns and radius R. They

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