Given the field H = 20Oρ^2 aφ A/m : (a)Dertermine the current density J
(b)Integrate J over the circular surface 0<ρ<1, 0<φ<2π, z=0, to determine
the total current passing through that surface in az direction. (c)Show that
the same result is obtained using the other side of Stokes' theorem.
Thanks！
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