# Electric Field Intensity

on . Posted in Electrical Engineering

Electric field intensity, abbreviated as $$E_i$$, also called electric field strength, is a vector quantity that represents the amount of electric force experienced by a unit positive charge placed at a point in an electric field.  It is the space around an electrically charge body in which a charge experiences a force of attraction or repulsion.  The electric field intensity due to a positive charge is always directed away from the charge, and the intensity due to a negative charge is always directed towards the charge.

For a system of multiple charges, the total electric field at a point is the vector sum of the individual electric fields produced by each charge.  The intensity of the electric field at any point due to a number of charges is equal to the vector sum of the intensities produced by the separate charges.

### Electric field Intensity formula

$$E_i = F \;/\; Q$$     (Electric Field Intensity)

$$F = E_i \; Q$$

$$Q = F \;/\; E_i$$

Symbol English Metric
$$E_i$$ = electric field intensity - $$V\;/\;m$$
$$Q$$ = electric charge $$C$$  $$A-s$$
$$F_e$$ = electrostatic force $$lbf$$  $$N$$

Tags: Electrical