electro statics

• the magnitude of the electro static forces exerted by two point charges on each other is directly proportional to the product of the magnitude of the charges and inversely proportional to the square of the distance between them


  Coulomb's law
• Electric field 


  Invisible forces around a charge that can be observed by attractive and repulsive forces it exerts on another charged object placed a point
• Electric field


  A region in space in which an electric charge will experience an electrostatic force
• The electric field strength at a point is the electrostatic force experienced per unit positive charge placed at the point


  the electric field strength at a point in a eletri field