A very long wire of radius R carries a current density given by J = Jor where Jo is a constant and r is the perpendicular distance from the central axis of the wire, i.e., the cylindrical radial coordinate as shown in the figure. Find the magnitude of the magnetic field at r > R, outside the wire.

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A very long wire of radius R carries a current density given by J = Jor
where Jo is a constant and r is the perpendicular distance from the central axis
of the wire, i.e., the cylindrical radial coordinate as shown in the figure. Find
the magnitude of the magnetic field at r > R, outside the wire.
Select one:
µoJor3
3R
µoJo
3r
HOJR²
2r
HoJor2
2R
Transcribed Image Text:A very long wire of radius R carries a current density given by J = Jor where Jo is a constant and r is the perpendicular distance from the central axis of the wire, i.e., the cylindrical radial coordinate as shown in the figure. Find the magnitude of the magnetic field at r > R, outside the wire. Select one: µoJor3 3R µoJo 3r HOJR² 2r HoJor2 2R
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