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The input is as follows:

Select a function, v (x, y) as electric field due to 2 point charges.

Function, v (x, y) is the electric field due to a positive charge at (0, 0, 0) (point 1) and a negative one at (0.5, 0.5) (point 2). The divergence of the electric field due to a positive charge at origin and a negative one at (0.5, 0.5, 0) ellipsis. Has a source at the origin and a sink at the (0.5, 0.5, 0), this is selected.

Has a source at the (0.5, 0.5) and a sink in the origin.

Plot v and change in c in the,

x y plane, (arrows for v, colors for divergence in v)

x y plane, (field lines for v, colors for divergence in v), this is selected.

x z plane, (arrows for v, colors for divergence in v)

x z plane, (field lines for v, colors for divergence in v)

Y z plane, (arrows for v, colors for divergence in v)

Y z plane, (field lines for v, colors for divergence in v)

Divergence in v equals v (x, y, z) minus v (x minus 0. 5, y minus 0.5, z minus 0.5).

The output is as follows:

In the x y plane, the x axis displays the numbers from negative 1.0 to 1 with an increment of 0.5. The y axis displays the numbers from negative 1.0 to 1 with an increment of 0.5. The arrows move in the spiral direction. In the first quadrant, the arrows from four sides move toward a central point. In the second quadrant, the arrows from origin move upwards toward the first quadrant. In the third quadrant, the arrows from origin move leftwards and downwards.In the fourth quadrant, the arrows from the origin move rightward pointing in upward direction.