Directly below, the magnetic field lines circulate counterclockwise, and directly above, they circulate clockwise around the power line.

The fingers wrap around the conductor in a circular manner, indicating the orientation of the magnetic field lines.

The thumb points from east to west in the direction of the current.

The direction of the magnetic field lines around a straight conductor depends on the direction of the current flowing through it.

The right-hand rule involves holding the conductor in your right hand, aligning the thumb with the current’s direction, and letting the curled fingers indicate the magnetic field’s circular orientation.