A long straight wire, carrying a current of 200
A, runs through a cubical wooden box,
entering and leaving through holes in the centers of opposite faces as shown
figure. The length of each side of the box is 20 cm. Consider an element
of the wire
1.0 cm long at the center of the box (shown in orange).
- Compute the magnitude of the magnetic
induction DB produced
by this 1.0-cm
element at the points labeled a, b, c, d, and e in the figure. Points a,
c, and d are
at the centers of the faces of the cube. Point b is at the midpoint of
Point e is at a corner.
- Copy the figure and show by vectors
the directions and relative magnitudes of
the field vectors.