Experiment Comparing Lighting Time between an LED and a Miniature Bulb Connected with Charged Capacitors : Regarding "Use of Electricity" for the Grade 6

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  • SAIKI Hideto
    Faculty of Education, Yamaguchi University
  • MORIWAKI Yuta
    Faculty of Education, Yamaguchi University:(Present office)Shobara Tojo Elementary School

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Other Title
  • 蓄電したコンデンサに発光ダイオードと豆電球を接続して点灯時間を比較する実験 : 第6学年「電気の利用」について
  • チクデン シタ コンデンサ ニ ハッコウ ダイオード ト マメ デンキュウ オ セツゾク シテ テントウ ジカン オ ヒカク スル ジッケン : ダイ6 ガクネン 「 デンキ ノ リヨウ 」 ニ ツイテ

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Abstract

<p>With the Japanese course of study for elementary schools revised, "Use of Electricity" was introduced as a new teaching unit for the grade 6. The course of study with science version exposition by Ministry of Education, Culture, Sports, Science and Technology includes an instance for the lighting time comparison between an LED and a miniature bulb connected with charged capacitors. By investigating the description contents of textbooks and teacher's manuals and also based on the makeup examination results for the teaching material experimentation, the following three things were clarified. 1. A capacitor charged by a hand generator did not activate an LED and a miniature bulb sometimes. Especially, an LED did not often light in the experiment in the procedure according to textbooks and teacher's manuals. 2. There was a possibility that the way to finish a generator might affect the result in the case of the experiment which is carried on at the rotation speed of lighting started. 3. There were some textbooks or teacher's manuals which did not describe how to keep a hand generator at a constant speed, how to finish after being charged, how to judge lighting up and out and confirmation matters of preliminary experiment. Therefore, we studied and suggested a preliminary experiment method to investigate conditions such as hand generator rotation speed and number for an LED and a miniature bulb lighted by a charged capacitor. Based on the study, in the practical training regarding preliminary experiment methods for teachers of elementary school, the study contents and the proposed preliminary experiment methods were evaluated well to be effective by the attended teachers.</p>

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