4.1 The Electrostatics Field

What is Coulomb’s law ?

Where ε₀ = 8.85 × 10⁻¹² C² / (N · m²) is the “permittivity constant,” q and q′ are the charges of the two particles, and r is the distance separating the particles.

What is the relationship between the electrostatic field, the electrostatic force and the charge q ? (formula)

F and E are colinear vectors

Mathematically how do u represent a positive/negative electric field ?

vector quantity directed radially from the charged particle and “oriented outward if the charge is positive, and inward if the charge is negative”

what is a dipole ?

A “dipole” is a group of two charged particles with the same charge magnitude q, opposite signs, and separated by a distance d.

The lines of the electric field generated by the dipole start from the positive charge and end in the negative charge, while the electrostatic field vector is tangent to the field lines

What is the dipole moment formula ?

Unit = C.m

What is the formula for the electric field of a deipole ?

z is the distance between the dipole and the observer

(it says what is the intensity of the disturbance the dipole generate from a certain distance)

What is the electric flux Φ through a surface ?

The amount of electric field that piecres the surface

What is the formula asoociated with the electrix flux a normal vector A receives from an electrostatic field E ?

What is the formula for the total electrix flux piercing a surface ?

Determinated my summing all differential electric fluxes, in N.m²/C

What is the formula for an enclosed GAUSSIAN surface ?

What is Gauss’ Law ?

the value of the enclosed charge within a closed surface is proportional to the net electric flux that pierces this surface