charge

• van de graph generator

  1. positive charge builds up on the top of the insulating stand
  2. the ions flow onto the metal dome and it becomes charged

  
• • the force between the charged object is a non contact force
• • opposite charged materials attract
• • like charged material repel
• • gaining electrons = negatively charged
  • losing electrons = positively charged
• • friction can cause electrons to move to/from a material
• • electrons are negatively charged
• • rubbing an acetate rod will transfer the electrons from the rod to the cloth
• • rubbing a polyethylene rod will transfer electrons from the rod to the cloth