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004
De weerstand R is:
a 100 Ohm
b
2500 Ohm
c 200 Ohm
n = 5
10 v in geeft 5 * 10 = 50 v
U = I x R
R = U / I
R = 50 / 20 mA = 2500 Ohm
Casio-fx-82NL
