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Natuurkunde Elektriciteit en magnetisme v3.xls
Electriciteit en magnetisme
Examenstof VWO * HAVO ^
Inductie en wisselstromen
*
Magnetische flux
Φ
= B
n
A
*
Inductiespanning
U
ind
= N (│ΔΦ│ / Δt)
Φ
[Wb]
=
U
ind
[V]
=
B
n
[T]
=
N
[-]
=
A
[m
2
]
=
ΔΦ
[Wb]
=
Δt
[s]
=
*
Wisselspanning
U (t) = U
max
sin (2
π
f t)
*
Wisselstroom
I (t) = I
max
sin (2
π
f t)
U (t)
[V]
=
I (t)
[A]
=
U
max
[V]
=
I
max
[A]
=
f
[s
-1
]
=
f
[s
-1
]
=
t
[s]
=
t
[s]
=
*
Effectieve spanning
U
eff
= 1/2 √ 2 (U
max
)
*
Effectieve stroomsterkte
I
eff
= 1/2 √ 2 (I
max
)
U
eff
[V]
=
I
eff
[A]
=
U
max
[V]
=
I
max
[A]
=
*
^
Transformator
U
p
/ U
s
= N
p
/ N
s
*
^
Transformator
U
p
I
p
= U
s
I
s
U
p
[V]
=
U
p
[V]
=
U
s
[V]
=
I
p
[A]
=
N
p
[-]
=
U
s
[V]
=
N
s
[-]
=
I
s
[A]
=
