【評論主題】88888888
【評論內容】Vc(3uF)=120*(4+2)/[(4+2+3)]=80VWc(3uF)=1/2*CV2=0.5*3*10-6*802=9.6*10-3J
【評論主題】88888888
【評論內容】Vc(3uF)=120*(4+2)/[(4+2+3)]=80VWc(3uF)=1/2*CV2=0.5*3*10-6*802=9.6*10-3J
【評論主題】88888888
【評論內容】Vc(3uF)=120*(4+2)/[(4+2+3)]=80VWc(3uF)=1/2*CV2=0.5*3*10-6*802=9.6*10-3J
【評論主題】88888888
【評論內容】Vc(3uF)=120*(4+2)/[(4+2+3)]=80VWc(3uF)=1/2*CV2=0.5*3*10-6*802=9.6*10-3J
【評論主題】88888888
【評論內容】Vc(3uF)=120*(4+2)/[(4+2+3)]=80VWc(3uF)=1/2*CV2=0.5*3*10-6*802=9.6*10-3J
【評論主題】88888888
【評論內容】Vc(3uF)=120*(4+2)/[(4+2+3)]=80VWc(3uF)=1/2*CV2=0.5*3*10-6*802=9.6*10-3J
【評論主題】88888888
【評論內容】Vc(3uF)=120*(4+2)/[(4+2+3)]=80VWc(3uF)=1/2*CV2=0.5*3*10-6*802=9.6*10-3J
【評論主題】88888888
【評論內容】Vc(3uF)=120*(4+2)/[(4+2+3)]=80VWc(3uF)=1/2*CV2=0.5*3*10-6*802=9.6*10-3J
【評論主題】88888888
【評論內容】Vc(3uF)=120*(4+2)/[(4+2+3)]=80VWc(3uF)=1/2*CV2=0.5*3*10-6*802=9.6*10-3J
【評論主題】12 __________ the author passed away twenty years ago, his stories live on.(A)Until (B)Because (C)Si
【評論內容】pass away 去世; 终止; 停止live .....看完整詳解
【評論主題】88888888
【評論內容】Vc(3uF)=120*(4+2)/[(4+2+3)]=80VWc(3uF)=1/2*CV2=0.5*3*10-6*802=9.6*10-3J
【評論主題】10. 如圖【七】所示,3μF電容器儲存之能量為: (A) 0.6✖ 10 -3 焦耳(B) 1.2 ✖10 -3 焦耳(C) 2.4✖ 10-3 焦耳(D) 9.6✖ 10-3 焦耳
【評論內容】Vc(3uF)=120*(4+2)/[(4+2+3)]=80VWc(3uF)=1/2*CV2=0.5*3*10-6*802=9.6*10-3J
【評論主題】10. 如圖【七】所示,3μF電容器儲存之能量為: (A) 0.6✖ 10 -3 焦耳(B) 1.2 ✖10 -3 焦耳(C) 2.4✖ 10-3 焦耳(D) 9.6✖ 10-3 焦耳
【評論內容】Vc(3uF)=120*(4+2)/[(4+2+3)]=80VWc(3uF)=1/2*CV2=0.5*3*10-6*802=9.6*10-3J
【評論主題】10. 如圖【七】所示,3μF電容器儲存之能量為: (A) 0.6✖ 10 -3 焦耳(B) 1.2 ✖10 -3 焦耳(C) 2.4✖ 10-3 焦耳(D) 9.6✖ 10-3 焦耳
【評論內容】Vc(3uF)=120*(4+2)/[(4+2+3)]=80VWc(3uF)=1/2*CV2=0.5*3*10-6*802=9.6*10-3J
【評論主題】10. 如圖【七】所示,3μF電容器儲存之能量為: (A) 0.6✖ 10 -3 焦耳(B) 1.2 ✖10 -3 焦耳(C) 2.4✖ 10-3 焦耳(D) 9.6✖ 10-3 焦耳
【評論內容】Vc(3uF)=120*(4+2)/[(4+2+3)]=80VWc(3uF)=1/2*CV2=0.5*3*10-6*802=9.6*10-3J
【評論主題】10. 如圖【七】所示,3μF電容器儲存之能量為: (A) 0.6✖ 10 -3 焦耳(B) 1.2 ✖10 -3 焦耳(C) 2.4✖ 10-3 焦耳(D) 9.6✖ 10-3 焦耳
【評論內容】Vc(3uF)=120*(4+2)/[(4+2+3)]=80VWc(3uF)=1/2*CV2=0.5*3*10-6*802=9.6*10-3J
【評論主題】10. 如圖【七】所示,3μF電容器儲存之能量為: (A) 0.6✖ 10 -3 焦耳(B) 1.2 ✖10 -3 焦耳(C) 2.4✖ 10-3 焦耳(D) 9.6✖ 10-3 焦耳
【評論內容】Vc(3uF)=120*(4+2)/[(4+2+3)]=80VWc(3uF)=1/2*CV2=0.5*3*10-6*802=9.6*10-3J
【評論主題】10. 如圖【七】所示,3μF電容器儲存之能量為: (A) 0.6✖ 10 -3 焦耳(B) 1.2 ✖10 -3 焦耳(C) 2.4✖ 10-3 焦耳(D) 9.6✖ 10-3 焦耳
【評論內容】Vc(3uF)=120*(4+2)/[(4+2+3)]=80VWc(3uF)=1/2*CV2=0.5*3*10-6*802=9.6*10-3J
【評論主題】10. 如圖【七】所示,3μF電容器儲存之能量為: (A) 0.6✖ 10 -3 焦耳(B) 1.2 ✖10 -3 焦耳(C) 2.4✖ 10-3 焦耳(D) 9.6✖ 10-3 焦耳
【評論內容】Vc(3uF)=120*(4+2)/[(4+2+3)]=80VWc(3uF)=1/2*CV2=0.5*3*10-6*802=9.6*10-3J
【評論主題】Efficient(有效率的) people know how to make ______ of their time. (A)mostly (B)best useful (C)the most u
【評論內容】be used to +Ving 意爲“習慣於”,其中的 to 是介詞used to +V 意爲“過去經常”,其中的 to 是不定式符號
【評論主題】12 If an aeroplane, a ship, or a person is given _____, they are given official permission to enter
【評論內容】clearance 名词 (authorization) 许可
【評論主題】33 You _________ your father the truth then. That way, he wouldn’t be so angry with you now.(A) shou
【評論內容】should have用來談及過去沒做到,但依理本應做到的事:I shoul.....看完整詳解
【評論主題】As I walked through the town, I was _________ reminded of my childhood.(A)conservatively(B)constant
【評論內容】D ?? 當我走過這城市,於是我回憶起我的童年
【評論主題】24. R-L-C串聯諧振電路,若輸入電源之頻率小於諧振頻率,則電路呈現:(A)電感性 (B)電阻性 (C)零阻抗 (D)電容性
【評論內容】當頻率大於諧振頻率時則wL>1/(wC),呈電感性當頻率小於諧振頻率時則wL<1/(wC),呈電容性當頻率等於諧振頻率時則w0L=1/(w0C),呈電阻性
【評論主題】25. 某一110V馬達驅動機械負載,若轉速穩定於2800rpm,輸出功率為1hp,且消耗電流為9A,此時該馬達的效率最接近下列何者?(A) 90% (B) 85% (C) 80% (D) 75%
【評論內容】效率=Pout/Pin=746/(9*110)約0.75=75%
【評論主題】23. 在R-L-C串聯電路中,已知v(t)=100sin1000t伏特,電阻R=10Ω,電感L=2mH,當電路發生諧振時,電容器兩端之最大電壓為多少?(A) 10V (B) 15V (C) 20V
【評論內容】共振時
Xs=Xc=XL=w*L=1000*2m=2歐姆
Q=Xs/R=1/5
Vcmax=Q*Vmax=1/5*100=20
【評論主題】19. 有一20mH電感兩端電壓為10 sin100 t伏特,則流經此電感器之電流有效值為多少?(A) 5A (B) 10A(C)5 A (D)10 A
【評論內容】Irms=Vrms/wL=10/(100*20*10-3)=5
【評論主題】88888888
【評論內容】因為灌電流產生旋轉,參考佛萊銘左手定則(電動機)F=LIxB;左手的食指,中指和拇指伸直,使其在空間內相互垂直。食指方向(B)代表磁場的方向(從N級到S級),中指(I)代表電流的方向(從正極到負極),那拇指所指的方向就是受力(F)的方向
【評論主題】10. 如圖【七】所示,3μF電容器儲存之能量為: (A) 0.6✖ 10 -3 焦耳(B) 1.2 ✖10 -3 焦耳(C) 2.4✖ 10-3 焦耳(D) 9.6✖ 10-3 焦耳
【評論內容】Vc(3uF)=120*(4+2)/[(4+2+3)]=80VWc(3uF)=1/2*CV2=0.5*3*10-6*802=9.6*10-3J
【評論主題】5. 如圖【二】,求Rab值為多少? (A) 6Ω(B) 8Ω(C) 10Ω(D) 12Ω
【評論內容】[(6//3)+8]//15
【評論主題】10. 如圖【七】所示,3μF電容器儲存之能量為: (A) 0.6✖ 10 -3 焦耳(B) 1.2 ✖10 -3 焦耳(C) 2.4✖ 10-3 焦耳(D) 9.6✖ 10-3 焦耳
【評論內容】Vc(3uF)=120*(4+2)/[(4+2+3)]=80VWc(3uF)=1/2*CV2=0.5*3*10-6*802=9.6*10-3J
【評論主題】As I walked through the town, I was _________ reminded of my childhood.(A)conservatively(B)constant
【評論內容】D ?? 當我走過這城市,於是我回憶起我的童年
【評論主題】Beijing has limited foreign ownership of Chinese banks to 25%, and even that hasleft Mr. Hu ________
【評論內容】be vulnerab.....看完整詳解
【評論主題】22. (In a third-person introduction situation) A:This is Professor Jim Lee from Central Police Unive
【評論內容】??
【評論主題】Efficient(有效率的) people know how to make ______ of their time. (A)mostly (B)best useful (C)the most u
【評論內容】be used to +Ving 意爲“習慣於”,其中的 to 是介詞used to +V 意爲“過去經常”,其中的 to 是不定式符號
【評論主題】12 If an aeroplane, a ship, or a person is given _____, they are given official permission to enter
【評論內容】clearance 名词 (authorization) 许可
【評論主題】33 You _________ your father the truth then. That way, he wouldn’t be so angry with you now.(A) shou
【評論內容】should have用來談及過去沒做到,但依理本應做到的事:I should have been kinder to her.我那時應該對她好一點的。
【評論主題】8 In this down economy, it's time to work on your quality networking, especially when your netw
【評論內容】A??
【評論主題】1.Being a police officer is ____ to your family and country.(A) a honor (B) an honor (C) a honesty (
【評論內容】horror 恐怖, 震驚, 毛骨悚然honor 榮譽; 名譽, 面子
【評論主題】As I walked through the town, I was _________ reminded of my childhood.(A)conservatively(B)constant
【評論內容】D ?? 當我走過這城市,於是我回憶起我的童年
【評論主題】Beijing has limited foreign ownership of Chinese banks to 25%, and even that hasleft Mr. Hu ________
【評論內容】be vulnerable to
【評論主題】22. (In a third-person introduction situation) A:This is Professor Jim Lee from Central Police Unive
【評論內容】??
【評論主題】I went shopping with John yesterday. I bought two shirts. ___________ shirts, John also bought two p
【評論內容】except 除……以外(不包含)beside在 ……旁邊
【評論主題】【題組】 4.Can you help your mom_____(wash) the dishes?
【評論內容】last time 上一次