uc(t)=1V t≤1s uc(t)=5-4e-(-DV 1s<t≤2s 注意 Nuc(t)=0.6+2.93e-2u-2)V t2s 必须标出各转折 点的数值 ic()=0 t<1s ic(t)=e-(-D)A Is<t<2s ic(t)=-1.465e2u-2)A p2s 3.53V uc,ic 1A 1V 0.3684 ----0.6V 0 t(s) -1.465A必须标出各转折 点的数值 ( ) 5 4e V 注意 ( 1)   t C u t ( ) 0.6 2.93e V 2( 2)   t C u t uC (t)=1V 1s < t  2s t>2s t  1s ( ) e A ( 1)  t C i t ( ) 1.465e A 2( 2)   t C i t iC (t)=0 t < 1s 1s < t < 2s t>2s 1V 3.53V 0.6V 1A 0.368A 1.465A uC , iC 0 1 2 t (s)