A coaxial cable carries a current I wire in its inner conducting wire and a curr

Question

A coaxial cable carries a current Iwire in its inner conducting wire and a current (Is) in its outer conducting shell. The radius of the wire is (Rw), the distance from the cable center to the inside of the shell is (Rs), and the distance from the center to the outer edge of the shell is (2Rs).

Determine all locations (if any exists) at which the magnetic field magnitude is zero if Iw = -Is.

Check all that apply.

Check all that apply.

The magnetic field is zero throughout all of the region outside the shell. The magnetic field is zero in the region inside the shell, at a radius r=Rs sqrt5/2 The magnetic field is zero at the very center of the wire. The magnetic field is zero in the region inside the shell, at a radius r=Rs sqrt1/2 There is no location where the magnetic field is zero.

Explanation / Answer

The magnetic field is zero in the region inside the shell, at a radius r=Rs sqrt1/2

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