Summary
Samenvatting - Nask 1 vmbo
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Alles wat je moet weten voor je examen nask1 over elektriciteit staat beknopt in deze samenvatting. natuurlijk is het ook handig voor als je nog in de 3e van mavo zit.
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Elektriciteit~nask 1
grootheid symbool eenheid
stroomsterkte I A
spanning U V
vermogen P W, kW en J/s
weerstand R Ω
tijd t h en s
energie E kWh en J
windingen N -
W = J/s :1000 kW
kWh x3 600 000 J
TJ x1000 GJ x1000 MJ x1000 KJ x1000 J
h x60 min x60 s
P=U x I E=P x t R=U/I
η betekend rendement, eenheid altijd in %
η=(Paf / Pop) x100 Paf= nuttig afgeven Pop= totaal opgenomen
η=(Eaf / Eop) x100
Serieschakeling:
- Stroomsterkte overal hetzelfde
- Spanning word verdeeld
Grootste weerstand=meeste spanning
Serie: It=I1=I2 Ut=U1+U2
Parallelschakeling:
- Spanning overal hetzelfde
- Stroomsterkte splitst
Grootste weerstand=minste spanning
Parallel: It=I1+I2 Ut=U1=U2
Transformator= Np/Ns = Up/Us p= primaire s= secundaire
Allebei de verhoudingen zijn even veel. Dus als er links x3 is aan de andere kant
ook x3.
Ideale transformator= Ps=Pp
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