electric field intensity

The magnitude of the electric field at any point.

Strictly speaking, the electric field is the set of all values of the electric field strength, but electric field and electric field intensity (as well as electric field strength and electric vector) are used more or less interchangeably. The trend is to use electric field both for the field taken as a whole and for its value at any point, context being sufficient to determine precise meaning.

(Also called electric field, electric intensity, electric field intensity, electric potential gradient, field strength, and probably others.) The electrical force exerted on a unit positive charge placed at a given point in space.
The electric field strength is expressed, in the mks system of electrical units, in terms of volts per meter and is a vector quantity. The electric field strength of the atmosphere is commonly referred to as the atmospheric electric field.