Do Now copy and complete tableElectrical conductors and insulators

An electrical conductor is a material through which electric current flows easily, as there are free electrons.All metals are conductors.

Electrical insulators have a very high resistance to the flow of electric current.

Complete the table below:

copper conductor

rubber insulator

steel conductor

mercury conductor

paper insulator

plastic insulator

diamond insulator

graphite conductor

1

2

3

4

5

6

Electrostatics

Learning today • Conductors and

Insulators and the electron model

• Unlike charges repel like charges attract

• Do simple experiments to demonstrate electrostatic charge

Static and current electricityStatic electricity describes the situation when electric charges remain stationary.This occurs best with insulators.

An electric current occurs when electric charges are moving from one place to another.This occurs best with conductors.

Electrostatics

1. There are two types of electric charge (positive and negative)

Hi! Hola!

Electrostatics

2. Opposites attract

Electric chargeElectric charge can be either positive or negative.

In an atom an electron has a negative charge that is of the same size as the positive charge of a proton. Neutrons have no electric charge.As an atom has the same number of electrons as protons it is uncharged.

Electrostatics

3. Static charges can be produced by the action of friction on an insulator

Plastic, amber, glass, Perspex

Electrostatics

4. Electrons are negatively charged

Electrostatics

5. Objects are charged positive by the loss of electrons

cloth

Electrostatics

6. Objects are charged negative by the gain of electrons

Only electrons move, that’s

why they call it electricity!

cloth

What can you do withstatic electricity?

1. Carry out the experiments on the sheet given to you

2. Everyone to answer the questions on the sheet

3. Stick the sheet in your books so you can see it no folding

Force and chargeWhen a charged object is brought close to an uncharged one the two objects attract each other.

The charged comb attracts the column

of water

Charged balloon attracted to a wall-

Phet

Attraction and repulsion

Two bodies that carry different types of charge attract.

Two bodies that carry the same type of charge repel.

The law of charges:LIKE CHARGES REPEL, UNLIKE ATTRACT.

This boy’s hair has all the same type of

charge!

Induced Charges

• Charges that appear on an uncharged object because of a charged object nearby are called induced charges.

• Copy this and draw the diagrams on page 172

Do NowStatic Electricity sheet

• Cut out the fact file and stick in your books

• Then answer the questions in your books

• Test is on Electricity period 1 Tuesday 20th November

Copy and complete

Static electricity occurs when electric ________ remains ____________ on an object.

An __________ object can be charged by __________ it with another insulator. One of them gains ________ and becomes negatively charged. The other becomes equally __________ charged.

The law of charges states that; ‘like charges _______, unlike _________’.

insulatingattract repel

positively chargestationaryelectrons

WORD SELECTION:

rubbing

insulating

attractrepel

positively

chargestationary

electronsrubbing

Fuse

• A fuse is a component in a circuit which –if the current is too high- blows and breaks the circuit.

What do you want to revise

• Look at yellow sheet or page 200 in your book

• With your name

ElectrostaticsYouTube - Refueling Fire Caused by Static Electricity

7. Static charges can be dangerous

Electrostatics

7. Static charges can be dangerous

Electrostatics

8. Static charges can be useful

Electrostatics

8. Static charges can be useful

ElectrostaticsYouTube - Bill Nye the Science Guy - 25: Static Electricity 1/3

YouTube - Mitsuba Systems - Sprayright Series 700 Powder Spray System

8. Static charges can be useful

Draw the sentence1. 2. 3. 4.

5. 6. 7. 8.

Draw the sentence

1. There are positive and negative charges2. Opposite charges attract and like charges repel3. Static charges can be made by the action of friction on an insulating

material4. Electrons are negatively charged5. Objects are charged positively by the removal of electrons6. Objects are charged negatively by the addition of electrons7. Static electricity can be dangerous (aeroplane refueling and gas

stations)8. Static electricity can be useful (painting, photocopiers and removal

of smoke from chimneys)