Question: An infinitely long wire lies along the z axis and carries a current of 20 A in the positive z direction. A second infinitely long

An infinitely long wire lies along the z axis and carries a current of 20 A in the positive z direction. A second infinitely long wire is parallel to the z axis at x = 10 cm.

(a) Find the current in the second wire if the magnetic field at x = 2 cm is zero.

(b) What is the magnetic field at x = 5 cm?

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