C當(dāng)=C+Mn/6=0.2%+0.61%/6≈0.2%+0.1%=0.3% 答:鋼材碳當(dāng)量為0.3%。
阻抗Z=U/I=25/150=0.167(Ω) 答:阻抗為0.167歐姆。