<< Chapter < Page Chapter >> Page >

Natuurwetenskappe

Graad 5

Energie en verandering

Module 35

Elektrisiteit as 'n vorm van energie

Aktiwiteit 1:

Om elektrisiteit as 'n vorm van energie te kan bespreek

[lu 1.1.1; 1.2.1; 2.1; 3.1]

Die belangrikheid van elektrisiteit

In ons moderne samelewing is 'n lewe sonder elektrisiteit ondenkbaar.

Maak gerus 'n lys van aktiwiteite waarvoor jy of jou gesin daagliks elektrisiteit gebruik.

Almal sal waarskynlik die gebruik van lig op hulle lys hê. Kom ons kyk 'n bietjie na die gloeilampie wat ons almal so goed ken.

  • Die gloeilampie is 'n goeie voorbeeld van 'n uitvindsel wat die mens se lewenswyse drasties verander het. Dit is ongeveer 100 jaar gelede deur 'n persoon met die naam Thomas Alva Edison ontwerp.

Bring 'n gloeilampie skool toe om jou met die onderstaande taak te help.

  • As jy na 'n elektriese gloeilamp kyk, sal jy sien dat dit die dun draadjie of filament is wat gloei en die lig afgee. Die filament word van tungsten gemaak. Tungsten is 'n metaal wat nie maklik smelt wanneer dit warm word en gloei nie. Die gloeilamp bevat geen lug nie, maar wel 'n onskadelike gas, argon, wat verhoed dat die filament uitbrand.

Die tungstendraad moet baie lank en dun wees om so helder te kan gloei. Om hierdie lengte draad in 'n gloeilamp te pas, word dit dikwels in 'n draadklos opgerol. Hierdie klos word deur 'n stel ander drade gedra.

Die krag of sterkte van die gloeilamp word op die gloeilamp aangedui. Dit word in 'watt' gegee, bv. in huishoudelike gloeilampe 40W (flouste), 60W (algemeenste), 75W, 100W of 150W (sterkste).

Kyk nou na die gloeilamp wat jy saamgebring het.

  1. Die gloeilamp is ______ watt. Wat vertel dit jou?
  2. Hoe pas jou gloeilamp in die houer?
  3. Kyk na die smalste deel van die gloeilamp. By watter deel dring die krag die

gloeilamp binne?

  1. Waarvan is hierdie gedeelte gemaak?
  2. Waarom dink jy is die stutdrade deur middel van 'n glasstut van mekaar geskei?
  3. Die tungstenfilament is op 'n sekere manier gevorm en deur drade gesteun. Waarom?
  4. Skets jou gloeilamp en voorsien dit van die nodige byskrifte.

Die opwekking van elektrisiteit

Onthou dat ons elektrisiteit gebruik om ENERGIE te verkry.

Die voordeel van elektrisiteit is dat dit ons minder afhanklik van brandstowwe in die natuur maak. Hierdie brandstowwe is besig om vinnig uitgeput te raak. Kom ons kyk na 'n paar maniere waarop elektrisiteit opgewek kan word.

  • Die dinamo

'n Dinamo kan as 'n kragopwekker vir byvoorbeeld 'n fietsryer dien sodat hy sy roete in die aand kan verlig. Doen navorsing en verduidelik kortliks hoe hierdie dinamo werk. Onthou om te sê waar die energie vandaan kom.

  • Opwekking van elektrisiteit met behulp van waterstrome

'n Hidroëlektriese kragsentrale maak gebruik van bewegende water vir die opwekking van elektrisiteit. Die water word met pype gelei om turbines te laat draai. Die turbine laat kragopwekkers (amper soos die dinamo van die fiets) draai. Hoe groter die druk of krag van die water wat deur die pype vloei, hoe meer krag word opgewek. Daar word dus seker gemaak dat daar genoeg water opdam deur middel van damwalle in riviere. Water gaar agter die damwal op.

Questions & Answers

anyone know any internet site where one can find nanotechnology papers?
Damian Reply
research.net
kanaga
Introduction about quantum dots in nanotechnology
Praveena Reply
what does nano mean?
Anassong Reply
nano basically means 10^(-9). nanometer is a unit to measure length.
Bharti
do you think it's worthwhile in the long term to study the effects and possibilities of nanotechnology on viral treatment?
Damian Reply
absolutely yes
Daniel
how to know photocatalytic properties of tio2 nanoparticles...what to do now
Akash Reply
it is a goid question and i want to know the answer as well
Maciej
characteristics of micro business
Abigail
for teaching engĺish at school how nano technology help us
Anassong
Do somebody tell me a best nano engineering book for beginners?
s. Reply
there is no specific books for beginners but there is book called principle of nanotechnology
NANO
what is fullerene does it is used to make bukky balls
Devang Reply
are you nano engineer ?
s.
fullerene is a bucky ball aka Carbon 60 molecule. It was name by the architect Fuller. He design the geodesic dome. it resembles a soccer ball.
Tarell
what is the actual application of fullerenes nowadays?
Damian
That is a great question Damian. best way to answer that question is to Google it. there are hundreds of applications for buck minister fullerenes, from medical to aerospace. you can also find plenty of research papers that will give you great detail on the potential applications of fullerenes.
Tarell
what is the Synthesis, properties,and applications of carbon nano chemistry
Abhijith Reply
Mostly, they use nano carbon for electronics and for materials to be strengthened.
Virgil
is Bucky paper clear?
CYNTHIA
carbon nanotubes has various application in fuel cells membrane, current research on cancer drug,and in electronics MEMS and NEMS etc
NANO
so some one know about replacing silicon atom with phosphorous in semiconductors device?
s. Reply
Yeah, it is a pain to say the least. You basically have to heat the substarte up to around 1000 degrees celcius then pass phosphene gas over top of it, which is explosive and toxic by the way, under very low pressure.
Harper
Do you know which machine is used to that process?
s.
how to fabricate graphene ink ?
SUYASH Reply
for screen printed electrodes ?
SUYASH
What is lattice structure?
s. Reply
of graphene you mean?
Ebrahim
or in general
Ebrahim
in general
s.
Graphene has a hexagonal structure
tahir
On having this app for quite a bit time, Haven't realised there's a chat room in it.
Cied
what is biological synthesis of nanoparticles
Sanket Reply
what's the easiest and fastest way to the synthesize AgNP?
Damian Reply
China
Cied
types of nano material
abeetha Reply
I start with an easy one. carbon nanotubes woven into a long filament like a string
Porter
many many of nanotubes
Porter
what is the k.e before it land
Yasmin
what is the function of carbon nanotubes?
Cesar
I'm interested in nanotube
Uday
what is nanomaterials​ and their applications of sensors.
Ramkumar Reply
how did you get the value of 2000N.What calculations are needed to arrive at it
Smarajit Reply
Privacy Information Security Software Version 1.1a
Good
Berger describes sociologists as concerned with
Mueller Reply
Got questions? Join the online conversation and get instant answers!
Jobilize.com Reply

Get the best Algebra and trigonometry course in your pocket!





Source:  OpenStax, Natuurwetenskappe graad 5. OpenStax CNX. Sep 23, 2009 Download for free at http://cnx.org/content/col10980/1.2
Google Play and the Google Play logo are trademarks of Google Inc.

Notification Switch

Would you like to follow the 'Natuurwetenskappe graad 5' conversation and receive update notifications?

Ask