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10. 電阻與電容串聯電路,電阻為2 kΩ,電容為25μF,此電路的時間常數為何?(A) 12.5ms (B) 25ms (C) 50ms (D) 100ms
問題詳情
10. 電阻與電容串聯電路,電阻為2 kΩ,電容為25μF,此電路的時間常數為何?
(A) 12.5ms
(B) 25ms
(C) 50ms
(D) 100ms
參考答案
答案:C
難度:
簡單
0.636
書單:
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9. 兩個電感 L1 = 12 mH、 L2 = 8 mH 串聯,且兩個電感之間無互感效應,若流過電感的直流電流為20A,則此兩個電感的總儲存能量為多少焦耳?(A) 2 (B) 3 (C) 4 (D)
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11. 兩個電壓時間函數v1(t)與v2(t),若v1(t)的相位超前v2(t)為60 °,則下列何者正確?(A) v1 (t)=20 sin ( 314t–30 °)V、v2 (t)=20cos(3
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