Static Electricity (unfinished)

Static electricity

Electricity which consists of charged particles at rest.

What type of energy may static electricity give rise to?

Current electricity, for example, during thunderstorms

What are the two types of charges?

• positive charge

• negative charge

Draw a diagram of both negative and positive charges

What causes objects to become charged?

The movement of electrons from place to place

What causes an object to become negatively charged

when surface electrons are transferred onto the object

What causes an object to become positively charged?

When surface electrons are transferred onto another object

How can a material become charged by friction?

When the materials are rubbed together, the frictional forces cause electrons to be transferred from one material to the other (since electrons are relatively free moving particles unlike protons which are tightly bound in the nucleus) which results in both materials becoming charged

Give two examples of friction being used to charge objects

1. Rubbing a polythene rod with a dry cloth. Rod (-) Cloth (+)

2. Rubbing a Perspex rod with a cloth. Rod (+) Cloth (-)