static electricity

static electricity

1. a conductor is a substance that allows charge to flow through it easily.

   • metals are conductors.

2. an insulator is a substance that does not allow charge to flow through it.

   • plastics are insulators.

3. similar charges repel; oppsite charges attract.

4. when one object is rubbed against another, electrons often get transferred from one object to the other

5. An object becomes positively charged if it loses electrons and negatively charged if it gains electrons

6. EARTHING

   • Earthing means connecting a charged object to the earth by means of a conductor, so that most of the charge which was on the object flows to the earth

7. Useful effects of static electricity

   • Nuisance effects of static electricity
     • 1. television screens attracting dust
     • 2. lightning
   • 1. removing soot from chimneys
   • 2. spray-painting