A wire is bent into the shape of a circle of radius r = 0.10 m and carries a 20.0-A current in the direction shown.
-What is the direction of the magnetic field at the center of the loop?

Question

A wire is bent into the shape of a circle of radius r = 0.10 m and carries a 20.0-A current in the direction shown. 
-What is the direction of the magnetic field at the center of the loop?

Quizplus · Accepted Answer

By applying the right-hand rule, we can determine that the magnetic field created by a circular wire flows in a direction perpendicular to the plane of the wire, and with the direction of the field determined by the direction of the current flow. At the center of the loop, the magnetic field lines will thus be flowing into the plane of the paper.

A Wire Is Bent into the Shape of a Circle