t = 10хв = 600c
m = 0,67г = 0,67 × 10⁻³кг
k = 1,12 × 10⁻⁶кг\Kл
l - ?
m = kIt; I = m / kt
I = 0,67 × 10⁻³ / (1,12 × 10⁻⁶ × 600) = 1A
