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AP Physics 2
12.3 Magnetism and Current-Carrying Wires
12.1 Magnetic Fields
AdvancedMCQGraphicalMathematicalConceptual24.7k
Measured magnetic field \(B\) as a function of inverse distance \(1/r\) from the wire.
Measured magnetic field \(B\) as a function of inverse distance \(1/r\) from the wire.
Students use a magnetic field sensor to measure the total magnetic field magnitude \(B\) at various perpendicular distances \(r\) from a long, straight vertical wire carrying a constant current \(I\). The sensor is oriented parallel to the magnetic field created by the wire. The students plot \(B\) as a function of \(\dfrac{1}{r}\) and fit a linear trendline to the data, as shown in the graph. Which of the following statements correctly interprets the physical meaning of the graph's features?

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