alleryBy the Biot-Savart law, the field of a current element is proportional to the:
ACapacity
BCharge
CCurrent
DVoltage
Answer & Solution
Correct answer: C. Current
1. A larger current means a stronger field from each element.
2. The field also grows with the element length.
3. So dB is proportional to the current I.
_Source: syllabus Physics Part I, Chapter 4, Moving Charges and Magnetism._
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