1) Q=I^2*R*t
I=U/R =>R=U/I=12B / 3.5A=3.42 Om
Q=12.25A^2*3.42Om*20c=837.9 Дж
2) P=I*U =>I=P/U=3*10^3 Bt / 10^3 B = 3A
1) Q=I^2*R*t
I=U/R =>R=U/I=12B / 3.5A=3.42 Om
Q=12.25A^2*3.42Om*20c=837.9 Дж
2) P=I*U =>I=P/U=3*10^3 Bt / 10^3 B = 3A