Particulate Nature of Matter B.5 Electric Circuits (id: 617c14bb6)

本题目来源于试卷: Particulate Nature of Matter B.5 Electric Circuits，类别为 IB物理学

[单选题]
A wire carries electmn na .sw f3v1a jwu2g87au+8oric ,+fmh,spjxe, gz (5dlal current. If $9.0×10^{12}$ electrons pass a given point in the wire every 4.5 seconds, what is the current in the wire?

A. $2.0\times10^{−7}A$
B. $3.2\times10^{−7}A$
C. $3.2\times10^{−4}A$
D. $2.0\times10^{12}A$


参考答案:  B


本题详细解析:

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