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UA = 0,4 V
IB= 0,02 A
UB = 0,8 V
RA, RB=?
R = U/I
RA = 0,4 V /0,02 A = 20 omów
RB = 0,8 V /0,02 A = 40 omów
RB/RA = 2
RB ma opór większy 2 razy