# Fundamental Physics/Electricity/Electric charge interaction

## Electric charges interaction of 2 opposite electric charge

Coulomb discovered that charges of the same polaities will repulse . Charges of different polarities will attract . Negative charge will attract positive charge . The force of attraction is called Electrostatic force or Coulomb force . Electrostatic force has a symbol FQ measured in unit Newton N

Electrostatic force or Coulomb force is used in calculating the force of negative charge attracts positive charge

${\displaystyle F_{Q}={\frac {|Q_{+}||Q_{-}|}{r^{2}}}}$

## Electric charge and electricity interaction

Ampere discovered that, electricity exerts a force to force electric charge to move in a linear path will create a field of electric lines called Electric field . This force is called Electrodynamic force or Ampere force which has a symbol FE measured in unit Newton N

${\displaystyle F_{E}=QE}$

## Electric charge and magnet interaction

Lorentz discovered that when electric charge travels through a magnet, magnet exerts a force to deflect

${\displaystyle F_{B}=\pm QvB}$
${\displaystyle F_{EB}=F_{E}+F_{B}=QE\pm QvB=Q(E\pm vB)}$