alleryStart learning →Far from a small current loop on its axis, the field falls with distance x roughly as:
A1/x
B1/x^2
Cx
D1/x^3
Answer & Solution
Correct answer: D. 1/x^3
B = mu0 I R^2/(2(x^2+R^2)^(3/2)) approaches mu0 I R^2/(2x^3) for large x.
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