lll 10.0 points A lung cylindrical shell has a uniferni current density. The tctal current cwing thrcugh the shell is Ii mi. The permeability cf free...

A long cylindrical shell has a uniform current density. The total current flowing through the shell is 6 mA. The permeability of free space is1.25664 × 10−6 T · m/A .

Find the magnitude of the magnetic field at a point r1 = 3.8 cm from the cylindrical axis. Answer in units of nT.

Question and diagram in attached file.