Force on a moving charge: . Force on a current element: . The connection: current , so . Both are manifestations of the Lorentz force. The magnetic force never does work on a charged particle (always perpendicular to velocity), but it CAN do work on a current-carrying wire (because internal energy of the battery is converted).
Part of JMAG-01 — Magnetic Effects: Biot-Savart & Ampere's Law
Magnetic Force on a Charged Particle vs. Current
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