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AP Physics C: E&M
12.4 Ampère’s Law
BeginnerMCQMathematical15k
Solid cylindrical wire of radius \(R\) carrying uniform current \(I\).
Solid cylindrical wire of radius \(R\) carrying uniform current \(I\).
A long, straight, solid cylindrical wire of radius \(R\) carries a total current \(I\) that is uniformly distributed across its cross-sectional area. Which of the following expressions gives the magnitude of the magnetic field \(B\) at a distance \(r\) from the central axis of the wire, for \(r < R\)?

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