Grade 9 Natural Sciences · Definion Series circuits and parallel circuits Resistor: • has a...
Transcript of Grade 9 Natural Sciences · Definion Series circuits and parallel circuits Resistor: • has a...
Grade9NaturalSciences
Term3:Energyandchange
Cells
2.1SourceCellsareasourceofelectricalenergy.
Cells
2.2Chemicalreac1onsSchema=crepresenta=on:
Chemicalpoten=alenergy(ionsbeforetheyareseparated).
Kine=c(movement)energyofcharges(electricalenergy)
Grade9NaturalSciences
Term3:Energyandchange
Seriescircuitsandparallelcircuits
3.1Conductorsandresistors3.1.1Conductors
Component Symbol PhotoConnector
Defini>on
Seriescircuitsandparallelcircuits
Connectors:•substancesthatconductanelectricalcurrent;•offerliCleresistanceagainstflowofcharge;•metalslikecopper,silver,iron.
Seriescircuitsandparallelcircuits
Poten>alenergy
Kine>cenergy
Electricalenergy
Inappliances
LED
Cars
Rheostat
Lightbulbs3.1.2Resistors
Defini>on
Seriescircuitsandparallelcircuits
Resistor:•hasahighresistanceagainsttheflowofcurrent;
•isthecomponentinacircuitthatcancontroltheenergytransferinthecurrentandconvertitintousefulforms;
•isaweakconductorofelectricity.
Seriescircuitsandparallelcircuits
Circuitcomponents:
Component Symbol PhotoResistorLightbulb
Seriescircuitsandparallelcircuits
3.1.3Factorsthatinfluenceresistance•Type•Length•Thickness•Temperature
Page226inGrade9NaturalSciencesTextbookandWorkbook
Aim: Tocreateacell/ba<eryusinglemons.
Results: Thelightbulbglows.
Conclusions: LEDthatburnsorthereadingonasensi6vemeter,isanindica6onthatanelectricalcurrentflowed.