Suppose that an infinite planar slab centered on the $z=0$ plane carries a uniform current flowing in the $+x$ direction. The magnetic field must be zero at all points
A) on the $z=0$ plane.
B) on the $y=0$ plane.
C) on the $x=0$ plane.
D) outside the slab.
E) inside the slab.
F) somewhere else (specify).

Question

Quizplus · Accepted Answer

The magnetic field is zero on the $z=0$ plane due to symmetry; the currents above and below this plane cancel each other out, resulting in no net magnetic field at points on this plane.

Suppose That an Infinite Planar Slab Centered on The z=0z=0z=0 Plane Carries a Uniform Current Flowing in The

Suppose That an Infinite Planar Slab Centered on The $z=0$ Plane Carries a Uniform Current Flowing in The