Question

State some characteristics of a magnetic field due to a current through a straight conductor.

Answer 1

Some characteristics of Magnetic Field Lines of a straight current-carrying conductor:

1. It forms concentric circles around the conductor.
2. It lies in a plane perpendicular to the conductor.
3. The reversal in direction of current flow reverses the direction of the field.
4. The strength of the field is directly proportional to the magnitude of the current.
5. The strength of the field is inversely proportional to the distance of the point from the wire.

The figure below represents the same:

These are the characteristics of a magnetic field around a straight current-carrying conductor.