Magnetic Field On Axis Of Circular Loop — the NEET Physics formula with its derivation, variables, validity constraints and worked solver.
Magnetic Field on Axis of Circular Loop This formula calculates the magnetic field strength at any point located along the central axis of a circular loop carrying current. The magnetic field is calculated using the Biot-Savart Law. The differential field element d B is projected onto the axis (x-axis). The resulting integral involves trigonometric terms related to the geometry (R and x). Integration of the components yields the final expression for B(x). R > 0 x is the distance along the axis from the center of the loop. Confusing this formula with the field of a straight wire (B = 0 I / (2 r)). Assuming the field strength is constant regardless of the distance x from the loop center. Forgetting that the field strength is proportional to the square of the radius (R 2).