102初等 基本電學 - 考試
By Zanna
at 2013-05-09T20:51
at 2013-05-09T20:51
Table of Contents
http://wwwc.moex.gov.tw/ExamQuesFiles/Question/102/102010_4514.pdf
第32題:答案(A) 請問用甚麼方法計算可以比較簡單 我打了一個下午的計算機
還是算不出正確答案 算到最後很亂很複雜 唉
第40題: 答案(A)
我的想法:
t=0 時 v(t)=0
t=π/8 v(t)=100
t=π/4 v(t)=0
0~π/4為一個正半週期的正弦波 面積2Vm=200
2Vm經過的時間為π/4 故200/(π/4)=254.77
答案為63.66 因為200/π=63.33 為什麼不是除π/4而是π呢?
--
第32題:答案(A) 請問用甚麼方法計算可以比較簡單 我打了一個下午的計算機
還是算不出正確答案 算到最後很亂很複雜 唉
第40題: 答案(A)
我的想法:
t=0 時 v(t)=0
t=π/8 v(t)=100
t=π/4 v(t)=0
0~π/4為一個正半週期的正弦波 面積2Vm=200
2Vm經過的時間為π/4 故200/(π/4)=254.77
答案為63.66 因為200/π=63.33 為什麼不是除π/4而是π呢?
--
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