26.承第 25 題,電容初始電壓 t = 0 時Vc (0) = 0 V,t≥0時Vi = 1 V,計算V0 (t1 ) = 10 V 時,t1為何? (A) 0.1 Sec (B) 0.2 Sec (C) 0.25 Sec (D) 0.5 Sec