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57. 一線圈之電阻為 30Ω,在電源頻率為 50Hz時,總阻抗為 50Ω,當電源頻率調為 200Hz時,該線圈電之感抗為 (A)100Ω (B)120Ω (C)140Ω (D)160Ω 。
問題詳情
57. 一線圈之電阻為 30Ω,在電源頻率為 50Hz時,總阻抗為 50Ω,當電源頻率調為 200Hz時,該線圈電之感抗為
(A)100Ω
(B)120Ω
(C)140Ω
(D)160Ω 。
參考答案
答案:D
難度:
計算中
-1
書單:
沒有書單,新增
上一篇 :
56. 某線圈接入直流 100 伏特電壓時,通過電流為 25 安培,接入 100 伏特交流電壓時,電流為 20安培,此線圈之感抗為 (A)1Ω (B)2Ω (C)3Ω (D)4Ω 。
下一篇 :
58. 一 RL 串聯電路,電阻 R=4Ω,感抗 XL=3Ω,下列敘述何者正確? (A)總阻抗為 7Ω (B)電壓滯後電流 53 度 (C)電壓超前電流 53 度 (D)總阻抗為 5Ω 。
資訊推薦
59. 一 RL 串聯電路,電源 v(t)=100 sin377t、電阻R=10Ω、電流 i=5A,該電路之總阻抗為多少歐姆? (A)20∠0° (B)20∠30° (C)20∠45° (D)20∠
60. 下圖係 (A)LC 串聯電路電流與頻率關係曲線圖 (B)LC 並聯電路電流與頻率關係曲線圖 (C)RLC 串聯電路電流與頻率關係曲線圖 (D)RLC 並聯電路電流與頻率關係曲線圖。
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