What is happening here?

Static Electicity

Where have you experienced static electricity? What causes all these interactions?

What is electricity? Electricity is a form of energy that may be converted into other forms of energy It can not be created or destroyed only changed from one form to another What do you think static electricity is?

Let’s try and generate some static electricity How can we explain the pieces of paper sticking to the balloon? (Hint. Think back to when you did the atom)

Charges Electrons are responsible for electricity In order for our balloon to attract the pieces of paper it must become charged with static electricity How did we charge our balloon? Friction We use friction to add or remove electrons from an object giving it a charge

Charges If a body has more electrons than protons it has a negative charge If a body has more protons than electrons it has a positive charge ParticleCharge Proton+ Electron- NeutronNeutral

What is the electrical charge on each material?

Homework Explain why the pieces of paper were attracted to our balloon (Hint: Look back at what we covered in class on charges) Question 2 of handout

Charges A body is negatively charged if it gains electrons A body is positively charged if it loses electrons

Repulsion and Attraction Unlike charges attract each other Like charges repel each other Neutral objects will also be attracted to charged objects

Earthing What is a conductor? What is an insulator? How do we get rid of the charge on an object?

Earthing When a charged object is connected to the ground by a good conductor that charge will flow to the earth The object is then neutral having lost its charge The object has been earthed/discharged

Applications of Static electricity Painting cars Photocopying