Flux

How much flows through

An interactive lesson with 6 steps, about 5 minutes: you predict, drag and solve, with instant feedback on every answer. It runs in your browser and needs JavaScript.

What you’ll learn

• Flux = flow across a curve: ∫ F · n ds.
• Only the component perpendicular to the net counts.
• Net flux out of a closed curve measures what’s produced inside.

Steps

1. Catching the flow
2. Angle the net
3. A source through a circle
4. A point source
5. Flux through a closed curve
6. A square net