The figure below shows a cross section of a hollow cylindrical conductor of radii a and b, carrying a uniformly distributed current $i$. Find the magnetic field magnitude $B(r)$ for the radial distance $r$ (a) in the range $b < r < a$, (b) $r = a$, (c) $b = 0$.
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(b) At r = a, the magnetic field is at its maximum value. This is because the magnetic field is directly proportional to the radial distance r. Show more…
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