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Tegnologie

Graad 7

Stelsels en beheer: elektrisiteit

Module 10

Wat is elektrisiteit?

Elektrisiteit

Agtergrond

Elektrisiteit is ‘n vorm van energie. ‘n Voorwerp wat die vermoë het om elektrisiteit te gelei, besit elektriese energie. Elektrisiteit word in Volt gemeet.

Elektriese energie kan maklik in ‘n ander vorm van energie omgesit word.

Daar is hoofsaaklik twee tipes elektrisiteit, naamlik

  • hoofstroomelektrisiteit
  • battery-elektrisiteit

Battery-elektrisiteit

Die elektriese energie word in ‘n battery gestoor. Daar word die energie chemiese energie genoem. Wanneer elektriese energie vloei, beweeg elektrone in ‘n elektriese stroombaan.

Die basiese elemente vir ‘n elektriese stroombaan is:

  • ‘n energiebron , bv. ‘n battery (‘n sel is 1,5V groot);

Skets

Simbool

  • ‘n geleier , nl. drade van ‘n metaal wat die stroom gelei;

Skets

Simbool

  • ‘n skakelaar wat ‘n oop of geslote stroombaan kan veroorsaak;

Skets

Simbool

  • ‘n lading in die vorm van ‘n lig-, klank-, beweging- of warmtebron;

‘n Lig

Simbool

‘n Gonser

Simbool

‘n Elektriese motor

Simbool

Twee of meer van dieselfde komponente van ‘n stroombaan kan op twee verskillende maniere in ‘n stroombaan gemonteer word, nl.

  • in serie , bv. ‘n positiewe pool van ‘n sel word met ‘n negatiewe pool van ‘n ander sel verbind;
  • in paralle l, bv. al die positiewe pole van twee of meer selle van ‘n battery word met mekaar verbind en al die negatiewe pole van twee of meer selle van ‘n battery word met mekaar verbind.

Voordeel van selle in serie – ‘n sterker stroom word gelewer.

Voordeel van selle in parallel – dieselfde stroom kan langer gelewer word.

Wenk aan onderwyser:

Hierdie werkkaarte kan in groepe gedoen word. Elke groep kan ‘n ander stroombaan bou en dit dan aan die klas demonstreer, waarna elke leerder individueel die werkkaarte kan voltooi. Elke groep kan eers ‘n toetsstroombaan met ‘n I,5 V-gloeilamp in ‘n gloeilamphouer, ‘n skakelaar, draad en ‘n 1,5 V-sel in ‘n selhouer op ‘n sagtebordbasis bou. Monteer eers die gloeilamphouer, die batteryhouer en die skakelaar. Verbind die komponente met die draad en plaas die battery en gloeilamp in die stroombaan.

Benodigdhede (materiaal en gereedskap) :

  • 1,5 V-selle
  • selhouers
  • 1,5 V-gloeilampies
  • gloeilamphouers
  • 7 skakelaars
  • 7 basisse van sagtebord, 150 mm by 150 mm
  • draad om komponente te verbind
  • skroefies om komponente op sagtebord te monteer
  • verbindings
  • skroewedraaiers (platbek- en ster-)
  • gonsers met ‘n lae volt
  • resistors en diodes

Opdrag 1:

Om ‘n ondersoek uit te voer d.m.v. ‘n eenvoudige:

Praktiese toets [lu 1.3]

Om toepaslike data te verkry [lu 1.4.4]

Om die stelsel te evalueer [lu 1.12]

Om kennis en begrip van elektriese stroombane te toon [lu 2.2]

WERKKAART 1:

  • Verbind een 1,5 V-gloeilamp in ‘n gloeilamphouer met ‘n sel in ‘n selhouer. Gebruik verbindingsdraad en monteer ook ‘n skakelaar.
  • Maak ‘n eenvoudige skets van die stroombaan.

1.3 Teken ‘n stroomdiagram van die stroombaan en gebruik die regte simbole.

1.4 Onderstreep:

Die gloeilamp brand (baie helder/ helder/ dof/ glad nie).

WERKKAART 2:

2.1 Verbind een 1,5 V-sel in ‘n selhouer met twee 1,5 V-gloeilampe in gloeilamphouers. Monteer die gloeilampe in parallel. Voeg ook ‘n skakelaar in die stroombaan en verbind die komponente met geleidingsdrade.

Questions & Answers

what are the products of Nano chemistry?
Maira Reply
There are lots of products of nano chemistry... Like nano coatings.....carbon fiber.. And lots of others..
learn
Even nanotechnology is pretty much all about chemistry... Its the chemistry on quantum or atomic level
learn
Google
da
no nanotechnology is also a part of physics and maths it requires angle formulas and some pressure regarding concepts
Bhagvanji
Preparation and Applications of Nanomaterial for Drug Delivery
Hafiz Reply
revolt
da
Application of nanotechnology in medicine
what is variations in raman spectra for nanomaterials
Jyoti Reply
I only see partial conversation and what's the question here!
Crow Reply
what about nanotechnology for water purification
RAW Reply
please someone correct me if I'm wrong but I think one can use nanoparticles, specially silver nanoparticles for water treatment.
Damian
yes that's correct
Professor
I think
Professor
what is the stm
Brian Reply
is there industrial application of fullrenes. What is the method to prepare fullrene on large scale.?
Rafiq
industrial application...? mmm I think on the medical side as drug carrier, but you should go deeper on your research, I may be wrong
Damian
How we are making nano material?
LITNING Reply
what is a peer
LITNING Reply
What is meant by 'nano scale'?
LITNING Reply
What is STMs full form?
LITNING
scanning tunneling microscope
Sahil
how nano science is used for hydrophobicity
Santosh
Do u think that Graphene and Fullrene fiber can be used to make Air Plane body structure the lightest and strongest. Rafiq
Rafiq
what is differents between GO and RGO?
Mahi
what is simplest way to understand the applications of nano robots used to detect the cancer affected cell of human body.? How this robot is carried to required site of body cell.? what will be the carrier material and how can be detected that correct delivery of drug is done Rafiq
Rafiq
if virus is killing to make ARTIFICIAL DNA OF GRAPHENE FOR KILLED THE VIRUS .THIS IS OUR ASSUMPTION
Anam
analytical skills graphene is prepared to kill any type viruses .
Anam
Any one who tell me about Preparation and application of Nanomaterial for drug Delivery
Hafiz
what is Nano technology ?
Bob Reply
write examples of Nano molecule?
Bob
The nanotechnology is as new science, to scale nanometric
brayan
nanotechnology is the study, desing, synthesis, manipulation and application of materials and functional systems through control of matter at nanoscale
Damian
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
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Source:  OpenStax, Tegnologie graad 7. OpenStax CNX. Sep 10, 2009 Download for free at http://cnx.org/content/col11031/1.1
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