Ответ:
1)
R=4/2 + 1 + 5=8 Ом
I=U/R
I=12/8=1.5 A
2)
R=pl/S
l=RS/p
A=ηU^2*t/R=cpVΔt
R=ηU^2*t/cpVΔt
l=ηU^2*t*S/p*cpVΔt
l=0.8*4*10^4*10*60*0.84/0.4*4200*2*80=60 A
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Ответ:
1)
R=4/2 + 1 + 5=8 Ом
I=U/R
I=12/8=1.5 A
2)
R=pl/S
l=RS/p
A=ηU^2*t/R=cpVΔt
R=ηU^2*t/cpVΔt
l=ηU^2*t*S/p*cpVΔt
l=0.8*4*10^4*10*60*0.84/0.4*4200*2*80=60 A