Problem 5: An infinitely long straight wire is strung out along the y-axis, and carries a current I in the +y-direction. Superimposed upon the magnetic field, B1), produced by the wire, is a uniform magnetic field, B(2), produced by other (distant) sources, with B2) pointing in the +x-direction. The net magnetic field, B = B(1) + B(2) is zero at some point located on the z-axis at a distance d from the x-axis. If the current in the wire is increased by a factor of 3, i.e., to I' = 31, without changing B(2), the net magnetic field, B, will vanish on the z-axis at a distance d' from the x-axis where (A) d' (B) ď (C) d' (D) ď' Зd 9d |3D (E) d' V3d

Problem 5: An infinitely long straight wire is strung out along the y-axis, and carries a current I in the +y-direction. Superimposed upon the magnetic field, B1), produced by the wire, is a uniform magnetic field, B(2), produced by other (distant) sources, with B2) pointing in the +x-direction. The net magnetic field, B = B(1) + B(2) is zero at some point located on the z-axis at a distance d from the x-axis. If the current in the wire is increased by a factor of 3, i.e., to I' = 31, without changing B(2), the net magnetic field, B, will vanish on the z-axis at a distance d' from the x-axis where (A) d' (B) ď (C) d' (D) ď' Зd 9d |3D (E) d' V3d