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Elektrische stroom
Elektriciteit en magnetisme
Examenstof VWO * HAVO ^
Elektrische stroom
* ^
Elektrische stroom
I = Δ Q / Δ t
I
[A]
=
Δ Q
[C]
=
Δ t
[s]
=
* ^
Wet van Ohm
U = I R
* ^
Vermogen elektrische stroom
P = U I
U
[V]
=
P
[W]
=
I
[A]
=
U
[V]
=
R
[
Ω
]
=
I
[A]
=
* ^
Vermogen elektrische stroom
P = I
2
R
* ^
Energie elektrische stroom
E = P t
P
[W]
=
E
[J]
=
I
[A]
=
P
[W]
=
R
[
Ω
]
=
t
[s]
=
* ^
Stroomsterkte bij
parallelschakeling
I = I
1
+ I
2
+ …
* ^
Vervangingsweerstand
parallelschakeling
1 / R
v
= 1 / R
1
+ 1 / R
2
+ …
I
[A]
=
R
v
[
Ω
]
=
I
1
[A]
=
R
1
[
Ω
]
=
I
2
[A]
=
R
2
[
Ω
]
=
* ^
Spanning bij
serieschakeling
U = U
1
+ U
2
…
* ^
Vervangingsweerstand bij
serieschakeling
R
v
= R
1
+ R
2
+ …
U
[A]
=
R
v
[
Ω
]
=
U
1
[A]
=
R
1
[
Ω
]
=
U
2
[A]
=
R
2
[
Ω
]
=
* ^
Weerstand homogene draad
R =
ϱ
(ℓ / A)
R
[
Ω
]
=
ϱ
[
Ω.m
]
=
ℓ
[m]
=
A
[m
2
]
=
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