Electricity

Electricity is a force that holds together atoms, molecules, solids and liquids. You can have: “bits” of positive electricity  or “Bits” of negative electricity


There are two main types of electricity:

STATIC ELECTRICITY:  Bits of positive or negative electricity that stays still

When two different insulating materials are rubbed together they become electrically charged.

Negative charges (electrons) rub off one material onto the other.

The material which gains negative charges becomes negatively charged.

The material which loses negative charges becomes positively charged.

• ELECTRIC CURRENT:  Bits of positive or negative electricity that moves around in a wire


BBC Bitesize: current and voltage (click here)

downloads_bbc_co_uk_bitesize_ks3_science_activities_activity03_activity_swf


Uses and safety of static electricity

Static electricity can be used in photocopiers and spray painting.

A charged object can be discharged by connecting it to earth with a conductor.

Static electricity can be dangerous (e.g. lightning). If the voltage becomes too great the negative charges can jump a gap causing a spark. This spark could ignite a flammable liquid nearby.


 



Electric circuit simulation (circuits 1, circuits 2, circuits 3, circuits 4, circuits 5)

Circuits 1

Circuits 2

Circuits 3

Circuits 4

Circuits 5


Boardworks simulations (true/false quiz, true/false quiz2, building a circuit)

 


How do we make electricity? (click here)


Videos

BBC_-_KS3_Physics_-_Electric_current_and_potential_difference_-_Video

 

 

 

 

 

 


Electricity lecture notes by Boardworks