Static Electricity

• Insulators do not conduct because they do not have electrons that can flow throughout the material
• Conductors conduct because they have delocalised electrons whish are not fixed in one place
• When two insulators rubbed together electrons will be transferred from one object to the other ; this means that one is positively charged and the other negatively charged
• Positive charges do not move
• When enough potential difference builds up electrons can jump from a highly negative object to a highly positive object ; this is a spark
• Two objects that carry the same type of charge repel
• Two objects that carry different types of charge attract
• Attraction and repulsion between two charged objects are examples of non-contact force
• Electric field lines go from positive to negative
• When a charged object is placed in a electric field it feels a force caused by the electric fields of the charged objects reacting with each other