Rобщ =R1+R2+R3= 10+40+30= 80
P-IU U=IR
PI^2 = 1,8^2×80 = 259,2 ВТ
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Rобщ =R1+R2+R3= 10+40+30= 80
P-IU U=IR
PI^2 = 1,8^2×80 = 259,2 ВТ