Untitled Document

Electric Force of Attraction and Repulsion

F aq1

F aq2

F a1/r**2

F=kq1q2/r**2

compare with gravitational force of attraction

F=Gm1m2/r**2

A fundamental difference between gravitational force and electric forces is that gravitational forces are always attractive and electric forces are attractive (for opposite charges) but repulsive (for like charges)
Typically gravitational forces are insignificant on a small (atomic or molecular) scale whereas electrical forces are very significant at small scales. Electrical forces are typically insignificant at a large (celestial) scale whereas gravitational forces are significant.