Electric field – two point charges

PhysicsElectric & Magnetic FieldsAges 16–17

Two point charges q₁ and q₂ sit a distance d apart. Watch the electric field lines, the Coulomb force F = k|q₁q₂|/r² between the charges, and the field vector E = E₁ + E₂ at a test point. Drag the test point anywhere on the plane to see E change direction and magnitude, or drag the charges to change the distance.