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Ontdek energie

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Ons kry hoofsaaklik twee tipes elektrisiteit, naamlik hoofstroomelektrisiteit en battery-elektrisiteit .

Opdrag 5A

Maak ‘n plakkaat van elektriese toestelle wat met hoofstroomelektrisiteit en met battery-elektrisiteit werk.

LU/AS 2.4

Agtergrond

Chemiese energie is elektriese energie wat byvoorbeeld in batterye se chemikalieë vasgevang word en het dus die potensiaal om ‘n elektriese stroom op te wek. By ‘n nat battery word twee metale, naamlik koper en sink, genaamd elektrodes, in ‘n suuroplossing genaamd elektroliet geplaas. ‘n Chemiese reaksie word veroorsaak, wat ‘n elektriese krag skep. Negatiewe elektrone vloei deur die suuroplossing van die koper na die sink. Die stroom vloei met die draad weer na die koper en so vloei die elektrisiteit aan. Die chemiese energie wat in ‘n battery gestoor word, word in VOLT gemeet. Ons kry dus batterye van verskillende sterktes en elk met ‘n positiewe en negatiewe pool.

‘n Italianer, Allessandro Volta, het in 1790 die eerste battery gemaak.

Stroom vloei altyd van ‘n positiewe pool na ‘n negatiewe pool in ‘n stroombaan. ‘n Elektriese stroom vorm dus wanneer elektrone in ‘n stukkie draad almal in dieselfde rigting beweeg. Om elektriese energie te verskaf, moet die elektrone in ‘n ononderbroke baan, genoem ‘n elektriese stroombaan , beweeg. Die enigste manier hoe ‘n persoon kan agterkom of daar ‘n stroom vloei, is om na sy uitwerking te kyk.

Watter basiese komponente het ‘n elektriese stroombaan?

  • Daar moet ‘n energiebron , byvoorbeeld ‘n battery, of elektrisiteit of ‘n opwekker wees;
  • Daar moet ‘n geleier wees, waardeur die elektriese energie kan vloei. Dit is gewoonlik ‘n metaal en bied min weerstand teen elektriese stroom.
  • Daar moet ‘n skakelaar wees waarmee jy die stroombaan kan laat vloei of onderbreek.
  • Daar moet ‘n lading wees wat die elektrisiteit gebruik, dit wil sê, ‘n lig-, klank-, beweging-, of warmtebron, sodat die chemiese energie omgesit kan word in elektriese energie wat dan een van bogenoemde vier kan word.

Isolators is materiaal wat nie elektrisiteit gelei nie, soos plastiek, rubber en glas. Dit word om metaaldraad of om gloeilamphouers gesit om te keer dat die stroom deur ander metaalvoorwerpe vloei wat daaraan raak.

Opdrag 5B

Elke komponent van ‘n stroombaan het ‘n spesifieke simbool sodat dit moontlik is om ‘n stroomdiagram van ‘n stroombaan te teken.

KOMPONENT SIMBOOL
‘n Battery
‘n Geleier
‘n Skuifskakelaar
‘n Gloeilamp
‘n LED
Stroomrigting
LU/AS 1.13

Opdrag 6

Skrywe of die volgende reëls oor hoe om versigtig met hoofstroomelektrisiteit om te gaan WAAR of ONWAAR is. Doen dit eers individueel en daarna in ‘n groep.

INDIVIDUEEL GROEP
a. Maak jou hande altyd droog voor jy aan elektriese skakelaars of toestelle werk.
b. Jy mag ‘n prop uittrek terwyl die muurskakelaar nog aan is.
c. Moenie ‘n prop uit ‘n muurskakelaar aan die drade uittrek nie - veral nie as die skakelaar nog aan is nie.
d. ‘n Verslete of uitgerafelde koord kan nie ‘n brand veroorsaak nie en is dus nie gevaarlik nie.
e. Dit is in orde om ‘n klomp passtukke in een sok te sit as jy verskillende toestelle tegelyk wil gebruik.
f. Muurproppe word ook in badkamers aangebring.
g. Dit is gevaarlik om ‘n metaalvoorwerp in ‘n muurprop te steek.
LU/AS 1.9

Jy kan baie seerkry as jy ‘n elektriese skok opdoen deurdat ‘n elektriese stroom van ‘n hoofstroomelektrisiteitsbron deur jou liggaam vloei. Jy kan ernstige brandwonde opdoen, jou spiere trek saam wat maak dat jy nie die draad kan los nie en jou hart en jou longe kan ophou werk.

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.
1.13 kies en gebruik gepaste tegnologie om die ontwerpproses aan te bied, aan te teken of te kommunikeer (bv. eenvoudige portefeulje, plakkate, diagramme, modelle)
LU 2
TEGNOLOGIESE KENNIS EN BEGRIPDie leerder is in staat om relevante tegnologiese kennis te verstaan en dit eties en verantwoordelik toe te pas.
Assesseringstandaarde(ASe)
Dit is duidelik wanneer die leerder die volgende doen:
Verwerking:
2.4 toon kennis en begrip van die komponente van ‘n eenvoudige elektriese stroombaan (bv. verbindingsdrade, battery, skakelaar, uitset-/leweringstoestel), en hoe elektriese energie na ander vorms (bv. lig, hitte, klank, beweging) omgeskakel kan word.

Memorandum

Energie

(kilo) Joule

Opdrag 1

Hang af van blikkies voedsel wat gebruik is.

Opdrag 2

Voedselsoorte wat suiker en stysels bevat.

Opdrag 3

Die atleet moet genoeg energie kan opgaar om die wedloop te kan voltooi en pasta bevat baie energie.

Opdrag 4

(a) ‘n hoëtroustel

(b) ‘n stoof

(c) ‘n bal aan ‘n rek

(d) ‘n gloeilamp

(e) ‘n elektriese trein

(f) ‘n motorbattery

Opdrag 5A

  • Hoofstroom-elektrisiteit Battery-elektrisiteit
  • Televisie flits
  • Bedlampie CD-speler
  • Haardroër
  • Ketel
  • Verwarmer
  • CD-speler

Opdrag 6

(a) W

(b) O

(c) W

(d) O

(e) O

(f) O

(g) W

Questions & Answers

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AI-Robot
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Kelo
Extuples Suppose that the short-run production function of certain cut-flower firm is given by: Q=4KL-0.6K2 - 0.112 • Where is quantity of cut flower produced, I is labour input and K is fixed capital input (K-5). Determine the average product of labour (APL) and marginal product of labour (MPL)
Kelo
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Quantity demanded refers to the specific amount of a good or service that consumers are willing and able to purchase at a give price and within a specific time period. Demand, on the other hand, is a broader concept that encompasses the entire relationship between price and quantity demanded
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Cornelius
In economics, the contract curve refers to the set of points in an Edgeworth box diagram where both parties involved in a trade cannot be made better off without making one of them worse off. It represents the Pareto efficient allocations of goods between two individuals or entities,
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Answer
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suppose the production function is given by ( L, K)=L¼K¾.assuming capital is fixed find APL and MPL. consider the following short run production function:Q=6L²-0.4L³ a) find the value of L that maximizes output b)find the value of L that maximizes marginal product
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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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