The Unseen Influence of Charge

Place positive and negative charges in space and visualize the invisible electric fields they create. Discover the force that governs everything from atoms to lightning.

The Rules of Attraction (and Repulsion)

Just like magnets, electric charges exert forces on each other. But instead of North and South, we have Positive (+) and Negative (-). The fundamental rule is simple: **opposites attract, and likes repel**. An electric field is the invisible 'force map' in space around a charge. By placing a tiny 'test charge' in the field, we can see which way it gets pushed or pulled, revealing the shape of this powerful, unseen force.

Electric Field Sandbox

Controls

Charge Strength (nC): 10

Show Field Lines

Test Charge Data

Point at the field to see the force on a positive test charge there. On a phone, choose 📍 Measure, then tap or drag.

Force Magnitude: N/A