007

De waarde Rb is:

a   120 K ohm
b   200 K ohm
c   10 K ohm
d   170 K ohm

URb = 9 - 0.5 = 8.5 V
Rb = Ub / Rb = 8.5 / 50 mu = 170.000 = 170 Kohm

┘

Casio fx-82NL