18.承上題,圖(六.b)最大輸出功率Pmax 為多少瓦特(W) ?
(A)49/40
(B)49/20
(C)7/10
(D)20/49
答案:登入後查看
統計: A(532), B(104), C(43), D(26), E(0) #920039
統計: A(532), B(104), C(43), D(26), E(0) #920039
詳解 (共 3 筆)
#1464140
Rt=3個30歐姆並聯=10;Eth=[18/30+13/30-10/30]X10=7V
6
0
#1497551
Pmax=(V^2)/(4*Rth)
5
1