2. ELECTRICITY

3. Circuits What are they? Circuits are a path along which electricity moves Closed, series circuit

4. Kinds of Circuits OpenClosed These circuits do not have a complete path to follow. The power cannot pass from the source to the receiver. These circuits have a complete path to follow. There are no openings in the path. Light when it is turned offLight when it is turned on

5. Kinds of Circuits SeriesParallel These circuits have only one path for current to flow. If one light goes out they all go out These circuits have more than one path for electricity to flow through. If one light goes out the rest stay on Old Christmas Lights*Your house *Power lines

6. Series Circuits

7. Parallel Circuits

8. Voltage Voltage is defined as the amount of work done or the energy required in moving a unit of positive charge (1 coulomb) from a lower potential to a higher potential. Voltage is also called potential difference (PD).

9. Current Current is the amount of electric charge (coulombs) flowing past a specific point in a conductor over an interval of one second. 1 ampere = 1 coulomb/second = 6.24 x 10 18 electrons Electron flow is from a lower potential (voltage) to a higher potential (voltage ).

10. Resistance Charges passing through any conducting medium collide with the material at an extremely high rate and, thus, experience friction. Resistance

11. The rate at which energy is lost depends on the wire thickness (area), length and physical parameters like density and temperature as reflected through the resistively

13. Ohm’s Law There is a simple linear relationship between voltage, current and resistance. Georg Ohm

14. Electricity Know what it is Know the different kinds Know about the different kinds of circuits Know about conductors and insulators

16. ElectroBoard Unfold and write the first matching column on the left hand side. On the right hand side, write the second matching column. Place a brad in the first hole on the left side. Locate the correct answer on the right side and place a brad in that hole. Connect the brads with a strip of aluminum foil. Tape the ENTIRE strip of foil down between each item! 9. This creates a series circuit that you can use for review. All you need to test the item is a continuity tester or a series circuit setup.

17. SOLAR POWER