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2D illustration of the link between electric field and electric potential. The grad(V) vector is computed at every point of a geometric matrix the interval values of which you can modify.

**Click** on the circles at lower right to select the interval to be used.

**Drag** the sliders to select the charge values

- To study the link between the electric field (vectorial value) and the electric potential (scalar value).
- To illustrate the 2D meaning of the gradient operator.