VoltOne

VoltOne is a calculator and reference for classical electrodynamics: nineteen modules, from electrostatics through radiation to the Lorentz transformation of fields. Every screen shows the relation it evaluates, the inputs it took, and the branch it is on. EVERY SCREEN SHOWS ITS GEOMETRY Seventeen screens draw the configuration you are in, and it follows your numbers: where r is measured from, which radius is the inner one, whether an angle opens from the normal or the surface, whether the acceleration lies along the velocity or across it. Those are the mistakes that produce a confident wrong answer. The two screens with no geometry say so instead. ELECTROSTATICS Fields and potentials of point-charge configurations. Gauss's law in closed form for line, plane, spherical shell, uniform sphere and cylinder, inside and outside. Multipole expansion, with the truncated potential shown against…