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首页> 外文期刊>Physics Education >Phys. Educ. 54 (2019) 045017 (7pp)
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Phys. Educ. 54 (2019) 045017 (7pp)

机译:物理。 教育 54(2019)045017(7PP)

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摘要

A recent physics challenge shows a circuit, where a voltmeter is connected in series. Indeed, real voltmeters have finite input resistance, therefore, one may think that they can be used as resistors. In addition, voltmeters measure the voltage difference between their terminals, so it seems to be possible to calculate the current flowing through them. Is it okay? Are there any hidden secrets? The underlying methodology is related to high-quality physics and STEM education, which are increasingly important in the modern world. On one hand, it can be considered as an approval of an improper use that one can never see in any textbook and application, and it may also occur that suggesting and teaching such uncommon solutions can generate an undesired attitude. On the other hand, one can also say that if the students are taught to always follow the application rules, then the development of their creativity can be hindered. We do think it deserves some discussion.
机译:最近的物理挑战表明了一个电路,其中电压表串联连接。 实际上,真正的电压表具有有限的输入电阻,因此,可以认为它们可以用作电阻器。 此外,电压表测量其端子之间的电压差,因此似乎可以计算流过它们的电流。 没关系吗? 有没有隐藏的秘密? 潜在的方法与高质量的物理和茎教育有关,在现代世界中越来越重要。 一方面,它可以被视为批准不当使用,即在任何教科书和应用中可以看出,也可能发生这种情况和教导这种罕见的解决方案可以产生不希望的态度。 另一方面,人们也可以说,如果学生们始终遵循申请规则,那么他们的创造力的发展就可以阻碍。 我们认为它应该得到一些讨论。

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