Question: A metal ring carries a current that causes a magnetic field B 0 at the center of the ring and a field B at point

A metal ring carries a current that causes a magnetic field B₀ at the center of the ring and a field B at point P a distance x from the center along the axis of the ring. If the radius of the ring is doubled, find the magnetic field at the center. Will the field at point P change by the same factor? Why?

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