Write definition of electric field intensity.Obtain an expression for electric force and electric pressure on the surcharge of a charged conductor.Draw necessary diagrams.

Electric Field Intensity:
The electric field intensity, denoted as E, at a point in space is a vector quantity that describes the force experienced by a positive test charge placed at that point due to the presence of an electric charge distribution. In other words, it measures the strength and direction of the electric force experienced by a unit positive charge at a given location in an electric field.

Expression for Electric Force:
The electric force (F) experienced by a point charge (q) placed in an electric field (E) is given by Coulomb's law: