Odpowiedź:
s = 2,5 mm² = 2,5* 10⁻⁶ m²
t = 5s
Q = 70 C
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J = ?
Q = I*t
I = Q/t = 70C/5s = 14 A
J = 14A/(2,5* 10⁻⁶ m²) = 560 000 A/m²
J = 560 000 A/m² = 560 kA/m²
