1.W=Pt=450W*60s=27000J.
2.P=U^2/R=(220V)^2/1210欧=40W.
W=Pt=40W*600s=24000J.
3.P=W/t=6.6*10^4J/60s=1100W.
R=W/I^2t=6.6*10^4J/(5A)^2*60s=44欧
有些除不通,我好看看自己做错了没……………………有些还不怎么懂呢
1.W=Pt=450W*60s=27000J.
2.P=U^2/R=(220V)^2/1210欧=40W.
W=Pt=40W*600s=24000J.
3.P=W/t=6.6*10^4J/60s=1100W.
R=W/I^2t=6.6*10^4J/(5A)^2*60s=44欧