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The magnetic field B due to a small current loop (which we
place at the origin) is called a magnetic dipole (Figure ). Let
p = (x2 + y² + z²)'/2. For p large, B = curl(A), where
A =
(a) Let C be a horizontal circle of radius R with center (0, 0, c), where
c is large. Show that A is tangent to C.
(b) Use Stokes' Theorem to calculate the flux of B through C.
Current loop
FIGURE

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