A long straight non-magnetic conductor of radius 8 mm?

A long straight non-magnetic conductor of radius 8 mm?is carrying a uniform current density of 100 kA/m2 in the aZ direction. For this case, which one of the following is not correct? (a) ∇ × H = 105 aZ A/m2 for 0 8 mm is (10^5)/2 ρaφ A......

A long straight non-magnetic conductor of radius 8 mm?
is carrying a uniform current density of 100 kA/m2 in the aZ direction. For this case, which one of the following is not correct? (a) ∇ × H = 105 aZ A/m2 for 0 < ρ < 8 mm (b) ∇ × B = 0 (c) The magnetic field intensity for ρ > 8 mm is (10^5)/2 ρaφ A/m (d) The total current carried by the conductor is...
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