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Summary Graad 8 Natuurwetenskappe (NW) Opsommings - Kwartaal 3 (Doc Scienta)

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Die opsommings is saamgestel deur die Doc Scientia handboek se Kwartaal 3 werk op te som. Eenheid 1:  Statiese elektrisiteit Eenheid 2:  Energie-oordrag in elektriese stelsels Eenheid 3:  Elektriese stroombane Eenheid 4:  Sigbare lig

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, 1.4 Veiligheid
1.1 Wrywing
• Elektriese ontlading is verantwoordelik vir die
skokke of vonke wat ervaar word wanneer ’n • Wrywing vind plaas wanneer twee neutrale
mens aan deurhandvatsels raak of ’n trui materiale teen mekaar gevryf word, wat
uittrek. veroorsaak dat elektrone van een materiaal
• Wrywing kan ladings op plastiek-petrolhouers na ’n ander beweeg.
veroorsaak, wat tot vonke kan lei wat • Die materiaal wat elektrone verloor,
ontvlambare brandstof kan aansteek. Eenheid 1: ontwikkel ’n positiewe lading, terwyl die
• Weerlig is ’n massiewe elektriese ontlading, en materiaal wat elektrone verkry, ’n
dit is die veiligste om tydens storms weg te bly Statiese negatiewe lading ontwikkel.



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van bome omdat hulle hoë punte is waar elektrisiteit • Materiale soos plastiek, glas en wol is
ontlading dikwels plaasvind. algemeen betrokke by hierdie oordrag van
elektrone.




Summaries after sample
1.3 Polarisasie
• Wanneer ’n gelaaide voorwerp naby ’n neutrale
voorwerp gehou word, veroorsaak dit ’n skeiding van
ladings binne die neutrale voorwerp.
• Die neutrale voorwerp ontwikkel ’n positiewe kant en ’n
negatiewe kant, al bly die voorwerp as geheel neutraal.
1.2 Kragte tussen ladings
• Die kant van die neutrale voorwerp wat die naaste aan ’n • Voorwerpe met gelyksoortige ladings stoot
negatief gelaaide voorwerp is, word positief en word mekaar af, terwyl voorwerpe met ongelyksoortige
gevolglik daartoe aangetrek. ladings mekaar aantrek.
• Sodra gelaaide voorwerpe aan mekaar raak,
beweeg elektrone tussen hulle totdat hul ladings
presies dieselfde is.


GR8 NW K3 Breinkaart Doc Scientia Kopiereg © www.summariessa.co.za (DO NOT COPY)

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