054
De stroom is:
a
0.5 A
b 1 A
c 1.5 A
d 2 A
┘
U=I*R
Ut = -2 + 4 = 2 V
Rt = 1 + 3 = 4 Ohm
It = Ut / Rt = 2 / 4 = 0.5 A