R = 10 omów
t = 1 s
W = 250 J
I = ?
W = U * I t ;
z prawa Oma obl. U
R = U/I
U = RI
W = R* I * I *t
W = R *I^2 t
I^2 = W/Rt]
I = pierwiastek z W/R8t
I = pierwiastek z 250 J/ 10 omów * 1 s
I = pierwiastek z 25 A^2
I = 5 A
[ J/om* s] = [VAs/ V/A* s] = [ A^2]