Magnetic field at a point on the axis of a circular loop, far from the loop (distance x ≫ R), behaves as:

1. Far from the loop, the magnetic field along the axis is that of a magnetic DIPOLE. 2. For a dipole, on the axis B ∝ 1/x³. 3. Compare: electric dipole field also goes as 1/r³ far away. _Source: NCERT Class 12 Physics Ch 4 §4.6 (axial field large-x limit)_