34.內阻為R歐姆之電流表,並聯一分流電阻r歐姆後,其電流之測定範圍可擴大為多少倍?(A)(R+r)/r (B)(R+r)/R (C)R/(R+r)(D)R/r (E)r/R

問題詳情

34.內阻為R歐姆之電流表,並聯一分流電阻r歐姆後,其電流之測定範圍可擴大為多少倍?
(A)(R+r)/r
(B)(R+r)/R
(C)R/(R+r)
(D)R/r
(E)r/R

答案：[無官方正解]
難度：計算中-1
書單：沒有書單，新增