Eduprobe
Question:
Which of the following correctly describes the magnetic field near a long straight wire?
the field consists of radial lines originating from wire
the field consists of straight lines perpendicular to the wire
the field consists of straight line parallel to the wire
the field consists of concentric circles centered on the wire
Solution:
The correct option is D. The field consists of concentric circles centered on the wire. The magnetic field lines of a long straight wire are comprised of concentric circles centered around the wire. The direction of magnetic field lines is given by the right-hand thumb rule.