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物理問題求詳解-----2小題!!!之二

Mar 24th 2014, 02:31

1.兩片極大之平行金屬板,假設其間距為d,兩板接於串聯的2個相同電池;若將兩板
距離增為3d,而改接於串聯的12個與前相同之電池時,則對置於平行板間之同一
點電荷所受之力,變為原來之多少倍?
(A)1 (B)2 (C)4 (D)8

2.長20米且粗細均勻的高電阻導線,與30伏特的電池兩極相聯.導線上距一端6米
之點,和距另一端2米之點,其間的電位差為多少伏特?
(A)4.5 (B)22.5 (C)1.5 (D)18

請詳細解析,謝謝!!!

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