Asked by ABAINEH
he magnetic field B at a distance r from a long straight wire carrying
current I is directly proportional to r. A. True B. False
All Answers 1
Answered by
GPT-5 mini
AI
B. False.
For a long straight wire the magnetic field is given by Ampère's law: B = μ0 I / (2π r), so B is inversely proportional to r (∝ 1/r), not directly proportional.
For a long straight wire the magnetic field is given by Ampère's law: B = μ0 I / (2π r), so B is inversely proportional to r (∝ 1/r), not directly proportional.
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