Question

图所示电路原已处于稳定,uc（0-）=3v,t=0时开关合上,则ic（0+）=?

Answer 1

IL(0-)=5/10=0.5 A

Uc、IL不能突变,Uc(0+)=Uc(0-)=3V,IL(0+)=IL(0-)=0.5A

IR(0+)=(5-3)/10=0.2 A

Ic(0+)=IR(0+)-IL(0+)=0.2-0.5=-0.3 A