電機甲專A 問題 - 考試

By Harry
at 2013-11-18T12:12
at 2013-11-18T12:12
Table of Contents
今年專A 這有幾題覺得怪怪的
http://www.taipower.com.tw/UpFile/JobTest/00_102/1021117_Q13_Q15_Q16A.pdf
1.10題 答案A
i(t)= -5sin(377t-110)
負號不是相等於 正負180度嗎?
5∠70 可是沒這選項..
2.16題 答案C
流過電感的電流 應該是連續性的?
i(0+) = i(0-)
3.34題 答案C
這題不能用 CB嗎?
課本有段話 疊接(Cascade)放大器
為了改善過低輸入阻抗 及減少勒效應所造成的高頻增益過低的電路
第一級CE 第二級 CB 直接耦合
4.50題 答案A
49題 iL(t)=3exp^-1.2t A 這裡沒問題
到50題問 t>1s , 想法是 到1s以後開關才切入
應該是將49題 t=1s 帶入 ,
iL(t)3exp^(-1.2) * exp-0.4t A 大家討論看看
請求解!!
--
http://www.taipower.com.tw/UpFile/JobTest/00_102/1021117_Q13_Q15_Q16A.pdf
1.10題 答案A
i(t)= -5sin(377t-110)
負號不是相等於 正負180度嗎?
5∠70 可是沒這選項..
2.16題 答案C
流過電感的電流 應該是連續性的?
i(0+) = i(0-)
3.34題 答案C
這題不能用 CB嗎?
課本有段話 疊接(Cascade)放大器
為了改善過低輸入阻抗 及減少勒效應所造成的高頻增益過低的電路
第一級CE 第二級 CB 直接耦合
4.50題 答案A
49題 iL(t)=3exp^-1.2t A 這裡沒問題
到50題問 t>1s , 想法是 到1s以後開關才切入
應該是將49題 t=1s 帶入 ,
iL(t)3exp^(-1.2) * exp-0.4t A 大家討論看看
請求解!!
--
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