93年地特 94年普考 基本電學 - 普考
By Bennie
at 2013-05-19T20:43
at 2013-05-19T20:43
Table of Contents
http://wwwc.moex.gov.tw/ExamQuesFiles/Question/093/004000c90.pdf
第三題 考選部沒提供答案
N1/N2=V1/V2=I2/I1
130/350=30/V2 V2=80.77V
130/350=I2/4 I2=1.48A
傳送效率為90% 我知道若是算功率的話就80.77*1.48*0.9=107.58 w
可是問副線圈的電位差與電流我就不會了
電位差與電流是80.77*√0.9和1.48*√0.9嗎?
http://wwwc.moex.gov.tw/ExamQuesFiles/Question/094/006432300.pdf
第35題 答案D
三角波有效值Im/√3 經半波整流等於??
平均值0.5Im 經半波整流等於??
方波有效值Im 經半波整流等於??
平均值Im 經半波整流等於??
有請高手指教了~~感謝~~
--
第三題 考選部沒提供答案
N1/N2=V1/V2=I2/I1
130/350=30/V2 V2=80.77V
130/350=I2/4 I2=1.48A
傳送效率為90% 我知道若是算功率的話就80.77*1.48*0.9=107.58 w
可是問副線圈的電位差與電流我就不會了
電位差與電流是80.77*√0.9和1.48*√0.9嗎?
http://wwwc.moex.gov.tw/ExamQuesFiles/Question/094/006432300.pdf
第35題 答案D
三角波有效值Im/√3 經半波整流等於??
平均值0.5Im 經半波整流等於??
方波有效值Im 經半波整流等於??
平均值Im 經半波整流等於??
有請高手指教了~~感謝~~
--
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普考
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