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Tegnologie

Graad 6

Stelsels en beheer: ‘n elektriese skok

Module 14

Waarom brand ‘n gloeilamp in ‘n stroombaan?

Agtergrond

Die elektriese energie word in hitte-energie omgesit en die gloeilamp gloei, want die wolframdraad in die gloeilamp bied weerstand teen die kragstroom. Die gas in die gloeilamp voorkom dat die draad uitbrand. Apparate soos gloeilampe, luidsprekers en stoofplate wat lig, hitte en klank voortbring, bied ook ‘n soort weerstand teen die stroom. ‘n Apparaatjie wat beweging kan voortbring, is ‘n elektriese motortjie.

Opdrag 1

  1. Bou ‘n eenvoudige stroombaan soos in die skets verduidelik.

Teken ‘n stroomdiagram van bogenoemde skets.

  1. Voeg nog ‘n gloeilamp in serie in die stroombaan. Brand die lig van die gloeilampe nou flouer of helderder?

Waarom? Onderstreep: Die beskikbare energie vir elke gloeilamp word (gehalveer/verdubbel).

Wat sal gebeur as een van die gloeilampies breek?

LU/AS 1.3
  1. Voeg nou ‘n gloeilamp in parallel in die stroombaan saam met (a). Skyn albei gloeilampies ewe helder?

Waarom? Onderstreep: (Dieselfde/verskillende) hoeveelheid energie word aan albei gloeilampies verskaf.

Wat sal gebeur as een van die gloeilampies breek?

  1. Toepassing: Onderstreep Die ligte in ons huise bly helder, al skakel jy hulle ook gelyk aan. Hulle kry dus dieselfde hoeveelheid elektriese energie van die kragbron. Die ligte in ons huise word dus in (serie/parallel) geskakel.
  2. Voel aan die gloeilampies.

Voel hulle warm of koud?

‘n Gloeilamp wat brand, verskaf dus nie net lig-energie nie, maar ook -energie.

LU/AS 1.3

Assessering

Leeruitkomstes(LUs)
LU 1
TEGNOLOGIESE PROSESSE EN VAARDIGHEDEDie leerder is in staat om tegnologiese prosesse en vaardighede eties en verantwoordelik toe te pas deur gepaste inligtings- en kommunikasietegnologie te gebruik.
Assesseringstandaarde(ASe)
Dit is duidelik wanneer die leerder die volgende doen :
Ondersoek:
1.2 vind uit oor bestaande produkte wat relevant vir ‘n probleem, behoefte of geleentheid is, en identifiseer en vergelyk die ontwerpaspekte daarvan (bv. vir wie dit is, waarvoor dit is, hoe dit lyk; waarvan dit gemaak is, hoe dit werk, of dit die omgewing sal affekteer);
1.3 voer, waar gepas, ‘n wetenskaplike ondersoek uit oor begrippe wat relevant vir ‘n probleem, behoefte of geleentheid is deur wetenskapprosesvaardighede te gebruik;

Memorandum

Opdrag 1

(a)

(b) flouer

gehalveer

Die stroom sal nie vloei nie.

(c) Ja

Dieselfde

Die ander gloeilampie sal bly brand.

(d) parallel

(e) warm

warmte

Questions & Answers

Is there any normative that regulates the use of silver nanoparticles?
Damian Reply
what king of growth are you checking .?
Renato
What fields keep nano created devices from performing or assimulating ? Magnetic fields ? Are do they assimilate ?
Stoney Reply
why we need to study biomolecules, molecular biology in nanotechnology?
Adin Reply
?
Kyle
yes I'm doing my masters in nanotechnology, we are being studying all these domains as well..
Adin
why?
Adin
what school?
Kyle
biomolecules are e building blocks of every organics and inorganic materials.
Joe
anyone know any internet site where one can find nanotechnology papers?
Damian Reply
research.net
kanaga
sciencedirect big data base
Ernesto
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
how did you get the value of 2000N.What calculations are needed to arrive at it
Smarajit Reply
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Source:  OpenStax, Tegnologie graad 6. OpenStax CNX. Sep 07, 2009 Download for free at http://cnx.org/content/col11004/1.1
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