Presentation on theme: "Do Now copy and complete table Electrical conductors and insulators An electrical conductor is a material through which electric current flows easily,"— Presentation transcript:
Do Now copy and complete table Electrical 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: copperconductor rubberinsulator steelconductor mercuryconductor paperinsulator plasticinsulator diamondinsulator graphiteconductor 123456
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 electricity Static 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!
Electric charge Electric 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 with static 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 charge When 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 Now Static 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 charge stationaryelectrons WORD SELECTION: rubbing insulating attract repel positively charge stationary electrons rubbing
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
Electrostatics YouTube - Refueling Fire Caused by Static Electricity YouTube - Refueling Fire Caused by Static Electricity 7. Static charges can be dangerous
Electrostatics 7. Static charges can be dangerous
Electrostatics YouTube - Bill Nye the Science Guy - 25: Static Electricity 1/3 YouTube - Mitsuba Systems - Sprayright Series 700 Powder Spray System YouTube - 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 sentence 1.There are positive and negative charges 2.Opposite charges attract and like charges repel 3.Static charges can be made by the action of friction on an insulating material 4.Electrons are negatively charged 5.Objects are charged positively by the removal of electrons 6.Objects are charged negatively by the addition of electrons 7.Static electricity can be dangerous (aeroplane refueling and gas stations) 8.Static electricity can be useful (painting, photocopiers and removal of smoke from chimneys)