Field Lines: Charge Bench
Drag point charges and watch Coulomb field lines, voltage contours and a test charge's force recompute live.
Bring charge layouts, the lesson or challenges and an optional palette. The Skill returns a downloadable Skill, an interactive demo and an example video.
How it works
Generate a project and edit layouts, voltage levels, palette and challenge text in lab.json.
Build the offline HTML and run the physics tests and bilingual interaction checks.
Download the Skill and explore its interactive demo and example video.
Frequently asked questions
Does it need a model key?
No. The scene runs offline and does not call a model.
Is it a recorded animation?
No. Lines, contours, forces and paths are computed in the browser from the charges you place.
Is it accessible?
It is designed toward WCAG 2.2 AA: labelled controls, visible focus, keyboard movement and a live text description of the field. Full conformance needs testing with assistive technologies and expert review.
What is measured?
Tests check mirror symmetry, line counts, zero crossings and perpendicular equipotentials; the report records interaction checks, CSP and headless performance.