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]
The diameter of a copper wplf q.f qk8oqd.t**.zire id /dp e18iq)gj3ow8.oe ,vqqis 0.081 inch. The maximum safe current it can carry (in order to prevent fire danger in building construction) is 20 A. At this current, what is the drift veqig/i1 qj).83 odpdovqw e8,elocity of the electrons? (The number of electron carriers in one cubic centimeter of copper is $8.5 \times 10^{22}$.)
A. 0.044 mm/s
B. 0.44 mm/s
C. 0.44 cm/s
D. 0.44 m/s
参考答案: B
本题详细解析:
暂无
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