Beschreibung:
<jats:p>This communication disputes the claim made by Ternan [J. Appl. Phys. 57, 1743 (1985)] that the Ampere and Lorentz force laws are equivalent. Two examples are quoted in which the two laws make different predictions. Particle beams in vacuum obey Lorentz’s law but in metallic circuits Ampere’s law prevails.</jats:p>