(2) v=at 8=0.2V 3) 8=0 (4)I= ￡_0.2 R = =0.1A 结束} 目录 e =0.2t(V) = 0.2 2 =0.1t(A) (2) v = at (3) e =0 I = e R (4) 结束 目录