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Samenvatting elektrische energie omzetten

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Elektrische energie omzetten kort samengevat (met formules)

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Written for

Institution
Secondary school
Level
KSO
Course
School year
5

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Uploaded on
June 12, 2021
Number of pages
4
Written in
2020/2021
Type
Summary

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ELEKTRISCHE ENERGIE OMZETTEN

WEERSTAND
→ een weerstand, in serie geschakeld in een stroomkring, verlaagt de stroomsterkte
- weerstand is de naam van een onderdeel van een toestel
- grootheid die aangeeft hoe sterk de stroomdoorgang wordt gehinderd
- symbool: R (weerstandswaarde)
- eenheid: Ω (Ohm)
- formule: R = U/I (u= spanning, i= stroomsterkte)




weerstand

parallel geschakeld in serie geschakeld

- stroomsterkte is verdeeld - stroomsterkte overal gelijk
- spanning is gelijk over de - spanning is verdeeld over de
weerstanden weerstanden
- hoe groter R, hoe kleiner I - hoe groter R, hoe groter U
- 1 weerstand stuk = blijft werken - 1 weerstand stuk = geen stroom
meer




toepassingen
- verwarmingselement van een oven → in het metalen omhulsel zit er een weerstand
- soldeerbout → weerstand in verdikking bij de punt = verwarmingselement
- achterruitverwarming auto → weerstandslint

ELEKTROCUTIEGEVAAR EN BEVEILIGING
netspanning = 230V wisselspanning




- blauw: neutrale draad → afvoer elektrische stroom
- bruin: fasedraad → aanvoer elektrische stroom
- gestreept geel/groen: aardingsdraad → beveiliging
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