NovaSolver

NovaSolver offers a web-based simulator for the Biot-Savart law that computes the on-axis magnetic flux density B(z) produced by a circular current loop. It addresses the need to visualize and calculate magnetic fields from steady currents in real time using the law's integral form. The tool is intended for users studying or demonstrating electromagnetism concepts.

It calculates B(z) for a loop defined by current I in amperes, radius R in centimeters, axial distance z in centimeters, and number of turns N. Numerical outputs include the center field B(0), the normalized ratio B(z)/B(0), and the half-width z_(1/2). Visual elements consist of a 3D perspective view showing the blue elliptical current loop, red arrows indicating counter-clockwise current direction, the symmetry axis, a yellow observation point, and an orange arrow whose length represents the magnetic field magnitude. A separate plot displays the bell-shaped B(z) profile over axial distances from -3R to +3R, with yellow dots marking the center and observation values along with a dashed line at the half-width points. Parameters can be adjusted directly and include a sweep function along z as well as a reset option. The simulator applies vacuum permeability mu0 equal to 4 pi times 10 to the minus 7 tesla meters per ampere and follows the right-hand rule for field direction.

The interface presents results and visualizations side by side with an accompanying section on theory and key formulas derived from the Biot-Savart law for a circularly symmetric loop. It is delivered as an interactive webpage available in English, Japanese, and Chinese versions under the NovaSolver site.