# Fundamental Physics/Electricity/Electrostatic force

## Electrostatic force

Or Coulomb force is used in calculating the force of negative charge to attract positive charge

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

## Application

For 2 electric charge of equal magnitude and opposite in polarities, the attraction force is calculated by coulomb's law

${\displaystyle F=K{\frac {Q^{2}}{r^{2}}}}$

Electric field

${\displaystyle E={\frac {F}{Q}}=K{\frac {Q}{r^{2}}}}$

Electric potential

${\displaystyle V=\int Edr=K{\frac {Q}{r}}}$