P1 = 25 W
P2 = 100 W
U = 230 V
R1 = ?
R2 = ?
P = U · I
I =
R =
R =
R1 =
= 2116 Ω
R1 =
= 529 Ω
W obliczeniach korzystamy z napięcia sieci domowej – U = 230 V.