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Energie-oordrag en kragte

Opvoeders afdeling


Hoe meer die breinaald bestryk word met die magneet, hoe meer skuifspelde sal daardeur getrek word. Leerders kan die breinaald verhit, kap of laat val om die magnetisme te vernietig.

Leerder afdeling


Aktiwiteit: groepwerk: om te leer hoe om ‘n magneet te maak [lu 2.4]

Elke groep kry:

  • ‘n staafmagneet
  • ‘n staal breinaald
  • wondergom
  • 10 skuifspelde

1. Sit die breinaald met wondergom op die bank vas.

2. Bestryk die naald van ent tot ent net in een rigting met dieselfde ent van die magneet. (Merk die punt van die naald waar jul die magneet oplig tydens bestryking.)

3. Herhaal dit 10 maal en kyk hoeveel skuifspelde die breinaald kan optel.


4. Herhaal dit nog 10 maal en kyk hoeveel skuifspelde julle dan kan optel.


5. Watter soort pool kom aan die punt wat jul gemerk het voor? ________________

(Gebruik die magneet waarmee die breinaald bestryk is daarvoor en hou die wet van magneetpole en die feit dat die rooi helfte van die magneet die noordpool is, in gedagte wanneer julle die besluit neem).

6. Skryf twee dinge neer wat julle sou kon doen om die breinaald sy magnetisme te laat verloor.





7. Voer die voorstelle in nr. 6 uit om vas te stel of dit wel gebeur. JA / NEE.

8. Gaan maak nou jou eie magneet by die huis, maar gebruik ‘n elektriese metode (‘n sel) om ‘n elektromagneet te maak. Jou opvoeder moet vir julle verduidelik. Maak seker dat jou “magneet” magnetiese stowwe kan aantrek wanneer jy dit klas toe bring. Die sukses van jou produk sal daaraan gemeet word.

7. Gebruike van magnete:

Magnetiese krag word daagliks aangewend om die lewe vir die mens makliker te maak.


Leeruitkomste 2: Die leerder ken, interpreteer en pas wetenskaplike, tegnologiese en omgewingskennis toe.

Assesseringstandaard 2.4: Dit is duidelik wanneer die leerder kennis toepas: pas konseptuele kennis toe deur ‘n begrip wat onderrig is met ‘n variasie van ‘n soortgelyke situasie in verband te bring.

Questions & Answers

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
Do somebody tell me a best nano engineering book for beginners?
s. Reply
what is fullerene does it is used to make bukky balls
Devang Reply
are you nano engineer ?
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.
what is the actual application of fullerenes nowadays?
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.
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.
is Bucky paper clear?
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.
Do you know which machine is used to that process?
how to fabricate graphene ink ?
for screen printed electrodes ?
What is lattice structure?
s. Reply
of graphene you mean?
or in general
in general
Graphene has a hexagonal structure
On having this app for quite a bit time, Haven't realised there's a chat room in it.
what is biological synthesis of nanoparticles
Sanket Reply
what's the easiest and fastest way to the synthesize AgNP?
Damian Reply
types of nano material
abeetha Reply
I start with an easy one. carbon nanotubes woven into a long filament like a string
many many of nanotubes
what is the k.e before it land
what is the function of carbon nanotubes?
I'm interested in nanotube
what is nanomaterials​ and their applications of sensors.
Ramkumar Reply
what is nano technology
Sravani Reply
what is system testing?
preparation of nanomaterial
Victor Reply
Yes, Nanotechnology has a very fast field of applications and their is always something new to do with it...
Himanshu Reply
good afternoon madam
what is system testing
what is the application of nanotechnology?
In this morden time nanotechnology used in many field . 1-Electronics-manufacturad IC ,RAM,MRAM,solar panel etc 2-Helth and Medical-Nanomedicine,Drug Dilivery for cancer treatment etc 3- Atomobile -MEMS, Coating on car etc. and may other field for details you can check at Google
anybody can imagine what will be happen after 100 years from now in nano tech world
after 100 year this will be not nanotechnology maybe this technology name will be change . maybe aftet 100 year . we work on electron lable practically about its properties and behaviour by the different instruments
name doesn't matter , whatever it will be change... I'm taking about effect on circumstances of the microscopic world
how hard could it be to apply nanotechnology against viral infections such HIV or Ebola?
silver nanoparticles could handle the job?
not now but maybe in future only AgNP maybe any other nanomaterials
I'm interested in Nanotube
this technology will not going on for the long time , so I'm thinking about femtotechnology 10^-15
can nanotechnology change the direction of the face of the world
Prasenjit 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, Natuurwetenskappe graad 7. OpenStax CNX. Sep 16, 2009 Download for free at http://cnx.org/content/col11078/1.1
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