Necker Cube

Electricity and Magnetism Level 4

A constant current \(I\) flows around the edges of a cube in two different ways as shown in the figure below. The magnetic induction vectors at the center of the cube in Fig. I and Fig. II are \(\vec{B}_{\text{I}}\) and \(\vec{B}_{\text{II}}\), respectively. Find the angle in degrees between these vectors.