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Nuclear & Quantum Physics E.2 Quantum Physics (id: 5366ec7df)

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admin 发表于 2024-2-6 20:33:50 | 显示全部楼层 |阅读模式
本题目来源于试卷: Nuclear & Quantum Physics E.2 Quantum Physics,类别为 IB物理学

[单选题]
In a vacuum chamber, electromagnetic radiatio38ei j tdk+f-(kea-sun of frequenc+ ynxj2fji 95vies $f_A$​<$f_B$​ just manage to produce a non-zero photocurrent from metals A and B respectively. When illuminated by an electromagnetic radiation of frequency $f$>$f_B$​, the stopping voltage for the photocurrents from plates A and B are recorded to be $V_A$​ and $V_B$​ respectively.
Which of the following is true about $V_A$​ and $V_B$​?

A. $V_A$​<$V_B$
B. $V_A​>V_B$​
C. $V_A​=V_B$​
D. Information provided is insufficient to compare $V_A​$ and $V_B$​


参考答案:  B


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