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In the Biot-Savart law, the field of a current element varies with distance r as

ADirectly with r^2
BInversely with r
CInversely with r^2
DInversely with r^3
Answer & Solution
Correct answer: C. Inversely with r^2
The law has r^2 in the denominator, making the field long range and inverse-square like Coulomb's law.
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