With the help of a labelled circuit diagram,illustrate the pattern of field lines of the magnetic field around a current-carrying straight long conducting wire. How is the Right-Hand Thumb Rule useful to find the direction of the magnetic field associated with a current-carrying conductor?

(N/A) The magnetic field lines around a straight current-carrying conductor are concentric circles with the wire as the center. The plane of these circles is perpendicular to the wire.
Right-Hand Thumb Rule: This rule states that if you imagine holding a current-carrying straight conductor in your right hand such that your thumb points in the direction of the current,then your fingers will wrap around the conductor in the direction of the magnetic field lines.