The phenomenon of a pulsating direct current in demonstrative experiment of hand alternator is founded and the reasonable explanation is presented.

发现了手摇交流发电机演示实验中出现脉动直流电的奇异现象并对此作出了合理的解释。

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According to the cognitive theory of physics study, this paper gives a preliminary theoretical exploration of the cognitive function of demonstrative experiment in physics teaching.

根据物理学习论中的认知理论，对物理演示实验的认知教学功能进行了初步的理论探索。

youdao

According to the cognitive theory of physics study, this paper gives a preliminary theoretical exploration of the cognitive function of demonstrative experiment in physics teaching.

根据物理学习论中的认知理论，对物理演示实验的认知教学功能进行了初步的理论探索。

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