At the center of a circular loop formed by a bent wire carrying current, the magnetic field lines are perpendicular to the plane of the loop. Each section of the wire contributes to the magnetic field at the center. According to Ampère’s circuital law, the magnetic field around a current-carrying conductor is in the form of concentric circles. For the loop, the contributions from all segments align at the center, producing a net magnetic field that appears as straight lines. The alignment indicates that the individual magnetic fields generated by different sections of the wire collectively contribute to a uniform field at the center.