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Home/Electricity & Magnetism/Electric Field Visualizer

Electric Field Visualizer

Point charges in 2D with electric field lines or vectors computed from Coulomb’s law. Add, move, or flip charge sign and watch the field reconfigure.

Who it's for: E&M intro; visualizing superposition of fields and symmetry.

Key terms

  • Coulomb’s law
  • electric field
  • superposition
  • field lines
  • point charge

New charge (click canvas)

2
15

Shortcuts

  • •Click — add charge (or drag existing)
  • •Use controls for sign and magnitude

Measured values

Charges2
|E| at center154.25arb.

How it works

Point charges in the plane (Coulomb model). The electric field E⃗ at each grid point is the vector sum of contributions qᵢ r̂ᵢ/rᵢ² (same direction as in your textbook). Arrows point in the direction a positive test charge would be pushed.

Key equations

E⃗ = Σ k qᵢ r̂ᵢ / rᵢ² (here k absorbed into relative q)