Question

While working with a compass and current-carrying wire, Hans observed that:A) The strength of the magnetic field was inversely proportional to the magnitude of the current in the wire.B) The magnetic field lines run in a plane parallel to the wire.C) If the direction of the current were reversed, the direction of the magnetic force would remain constant.D) The magnetic field lines run in a plane perpendicular to the wire.

Answer 1

In a wire that carries a current, a magnetic field is formed around the wire. The field lines of the magnetic field run around the wire, as shown:

This means that the magnetic field lines are located in a plane that is perpendicular to the wire. The right option is D.