A very long, hollow cylinder (radius 3.1cm) is formed by rolling up a thin sheet of copper. Electric charges flow along the copper shee parallel to the axis of the cylinder. The arrangement is, in effect a hollow tube of current 1.9A. Use Ampère's law to find the magnetic field (a) outside the cylinder at a distance 7.2cm from the axis and (b) inside the cylinder at a distance 1.2cm from the axis.

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A very long, hollow cylinder (radius 3.1cm) is formed by rolling up a thin sheet of copper. Electric charges flow along the copper sheet
parallel to the axis of the cylinder. The arrangement is, in effect, a hollow tube of current 1.9A. Use Ampère's law to find the magnetic
field (a) outside the cylinder at a distance 7.2cm from the axis and (b) inside the cylinder at a distance 1.2cm from the axis.
(Hint: For closed paths, use circles perpendicular to and centered on the axis of the cylinder.)
Transcribed Image Text:A very long, hollow cylinder (radius 3.1cm) is formed by rolling up a thin sheet of copper. Electric charges flow along the copper sheet parallel to the axis of the cylinder. The arrangement is, in effect, a hollow tube of current 1.9A. Use Ampère's law to find the magnetic field (a) outside the cylinder at a distance 7.2cm from the axis and (b) inside the cylinder at a distance 1.2cm from the axis. (Hint: For closed paths, use circles perpendicular to and centered on the axis of the cylinder.)
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