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範例:電阻定律

有根電線電阻為R1,如將其拉長為原來之n倍,而電線的體積不變,此時電線的電阻為R2,則R2/R1為 (A)n (B)n2 (C)1/n (D)1/n2 (E)1/n3。【69夜大】  


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Posted in 電阻與歐姆定律.

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By admin – 2009 年 12 月 18 日

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