本题目来源于试卷: Physics Unit18: Electric Currents，类别为 国际高中通用物理
[单选题]
A heavy bus bar is 20 cm long andbt37.y- v ,v5zeyaoi n7jdjz8 of rectkwh;kv2m /at6angular cross-section, 1.0 cm x 2.0 cm. What is the voltage drop along its length whek 6mkvhw/ta ;2n it carries 4000 A? (The resistivity of copper is $1.68 \times 10^{-8} \Omega \cdot m$)
A. $0.67 \; V$
B. $0.34 \; V$
C. $0.067 \; V$
D. $0.034 \; V$
参考答案: C
本题详细解析:
暂无
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