A = Pt
P = U^2/R
R = ρl/S =ρl/πr^2 = 0,13 × 0,08/π × 25 × 10^-6 = 132 Ом
P = 220^2/132 = 48400/132 = 367 Вт
A = 367 × 180 = 66000 Дж
A = Pt
P = U^2/R
R = ρl/S =ρl/πr^2 = 0,13 × 0,08/π × 25 × 10^-6 = 132 Ом
P = 220^2/132 = 48400/132 = 367 Вт
A = 367 × 180 = 66000 Дж