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試卷名稱：114年 - 114 國立清華大學_學士後醫學系_自然科學組﹕物理化學#126266
年份：114年
科目：學士後西醫物理及化學
46. Gold (Au) and tin (Sn) wires are joined together at both ends. The length ratio of the Au and Sn wires is 1:3 and both wires have the same cross-sectional area. A potential difference of Vis applied to the free ends. The ratio of the conductivities of Au and Sn is 5:1 and the ratio of the free electron densities of Au and Sn is 5:2. Which of the following statements is correct? Au Sn 
(A) The resistance of Au and Sn wires has the relation 
= 1:6.
(B) The voltage across of Au and Sn wires has the relation 
= 1:15.
(C) The electric field in Au and Sn wires has the relation 
= 1:1.
(D) The drift velocity of electrons in Au and Sn wires has the relation 
=1:5.
(E) None of the above is correct.
