Electric Fields Lab — Discover Physics

Charge magnitude |q| 3.0 μC

Field Lines Field Vectors Equipotentials Force Arrows Field Heatmap

Field Line Density 12

Click anywhere on canvas to measure E and V at that point

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Total Charges0

Net Charge0 μC

System Energy0 J

Max |E|0 N/C

Click a charge to select it

Coulomb's Law

F = k·q₁·q₂ / r²

k = 8.99×10⁹ N·m²/C²

Electric Field

E = k·q / r²

Direction: away from +, toward −

Electric Potential

V = k·q / r

Scalar sum of all charges

Potential Energy

U = k·q₁·q₂ / r

+U: repulsive, −U: attractive