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The Biot-Savart field falls off with distance as its:
AInverse cube
BInverse only
CPlain square
DInverse square
Answer & Solution
Correct answer: D. Inverse square
1. Moving away from the element weakens the field.
2. The weakening follows a particular power of r.
3. It is inversely proportional to the square of the distance.
_Source: NCERT Class 12 Physics Part I, Chapter 4, Moving Charges and Magnetism._
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