Question

why two electric fields can't intersects????​

Answer 1

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The electric lines of force can never intersect because they start from the positive charges and end at negative charges. On the line of force, if we take a point and draw a tangent to it, it will give the direction of electric field at that point. So if two lines intersect, that means at the same point two directions of electric fields is there which is impossible.

Answer 2

Electric field lines cannot cross. ... This is because they are, by definition, a line of constant potential. The equipotential at a given point in space can only have a single value. If lines for two different values of the potential were to cross, then they would no longer represent equipotential lines.