Electricity

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Electricity

  1. 1. Electricity<br />
  2. 2. All matter is made of<br />atoms<br />
  3. 3. Charge on the parts of an atom<br />Negative charge (-)<br />No charge<br />Positive charge (+)<br />
  4. 4. Charged particles<br />Adding or removing electrons results in charged particles. This can be caused by friction or contact.<br />++++++++ +++++ +++++++<br />------- ----- --------<br />Positive Neutral Negative<br />
  5. 5. Activities results<br />Plastic rod + COTTON- Bent water least<br />+ WOOL- Bent water most<br />+SILK- Bent water next <br />Balloon + WOOL- Balloon moves towards the wool<br />Balloon + Balloon- Balloon repelled each other<br />Picking up rice= 6 grains max.<br />
  6. 6. Important concepts of electric charge<br />Opposite charges attract each other<br />Like charges repel each other<br />Objects with more electrons than protons are negative<br />Objects with less electrons than protons are positive<br />Objects with the same number of electron and protons are neutral<br />Only electrons move when an object is rubbed<br />Electricity is caused by electrons<br />
  7. 7. What do atomic particles have to do with electricity<br />Electricity is the result of a flow of electrons. All matter is made of atoms; this means matter is full of electrons. This is important because whenever an electric current appears in an object, the electrons already present within it are forced to flow. <br />
  8. 8. Static vs Current Electricity<br />Static electricity is when the charge (electrons) builds up in an object and stay put (are stationary) until something come into contact with it.<br />
  9. 9. An electric current is when the electric charge (electrons) flows through a path (circuit). This is the type of electricity that powers the appliances in our homes.<br />
  10. 10. Electric circuits<br />When electricity flows through an electric circuit, electrical energy is changed into sound, light, heat or kinetic energy by the appliance it is flowing through.<br />An electric circuit must have a power supply (battery or powerpack), a conducting path (the wires the charge flows through) and a load (appliance).<br />
  11. 11. Circuit diagrams<br />Symbols are used to represent the different parts of a circuit. The symbols are universal so everyone knows what they represent.<br />
  12. 12. The flow of electric charge is called an electric current.<br />The unit that measures electric current is amperes or amps<br />We can think of it as counting how many electrons pass a certain point each second<br />
  13. 13. The energy of the electric charge is called the voltage. It is measured in volts<br />We can think of this as how many hats each electron has and can therefore give away to an appliance in the circuit.<br />
  14. 14. Conductors and Insulators<br />

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