The strength of the electric field (E) at the position indicated by the dot can be obtained with the formula: E = F/q where;
F = Force exerted per unit and
q = Positive electric charge at that point.
The strength of an electric field, E refers to the force exerted per unit positive charge. It is indicated by the formula: E = F/q. Its SI unit is Newton per Coulomb or Volts per Meter (V/M).
Note that the strength of an electric field is strongest where the lines are close and weakest when the lines are further apart.
The complete question is not provided but the above formula can be used in arriving at the answer.
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