electrostatics

• electrostatics

  interaction of charges that are stationary
• principle of conservation of charge


  charge on a system remains constant
• polarisation 


  process of causing an object to be polarised
• net charge 


  sum of charges
• when electrons are moved from an atom, the atom becomes more positive
• when protons are removed from an atom, the atom becomes more negative
• electrons can only be added or removed
• insulators 


  charges can not be moved easily, so you need to force them using friction
• conductor


  charges can move freely