Question

Which of the following correctly describes the magnetic field near a long straight wire?

• A. The field consists of straight lines perpendicular to the wire
• B. The field consists of straight lines parallel to the wire
• C. The field consists of radial lines originating from the wire
• D. The field consists of concentric circles centred on the wire

Answer 1

The correct option is D

The field consists of concentric circles centred on the wire

The magnetic field lines near a long straight wire are concentric circles and the direction of field lines can be found using right hand rule.