雷発生器 【実験】
・図１の雷発生器のスイッチを押すと、２つのワニ口クリップの間に数千から数万ボルトの電圧がかかります。ためしにワニ口クリップを持ってスイッチを押すと少しビリっとします。
・ワニ口クリップを図２の雷発生板のA～Dに挟んでスイッチを押すと小さな雷が見られます。それぞれの場合を以下に説明します。以下の写真の撮影では、露光時間を長くして複数回の放電を重ねて撮影しています。
図１ 雷発生器
図２ 雷発生板
・AとBを挟んだ場合、AとBの導線の間に放電が見られます。（図３、図４）
図３ AB間
図４ AB間 拡大
・BとCを挟んだ場合、B→金具→Cの放電が見られます。BC間の金具を動かすことで、放電の位置が変わります。この実験から、空気中の距離が短くなるように放電することがよくわかります。（図５～図８）
図５ BC間 左に放電
図６ BC間 左に放電 拡大
図７ BC間 右に放電
図８ BC間 右に放電 拡大
・CとDを挟んだ場合、C→金具→金具→Dの放電が見られます。右側の金具は左右に動かすことができ、金具の間隔をだんだんと近づけていくと図９→図１０→図１１のようになります。図１１の金具で囲まれた部分には電気が流れないことが自然に理解できます。雷の時には車の中にいれば安全！静電遮蔽ですね。
図９ CD間 金具間隔大
図１０ CD間 金具間隔小
図１１ CD間 金具接触
動画はこちら
公開日：
最終更新日：2016/05/16
comment
お教えください。
雷発生器を作りたいのですが、安価に自作できる方法をお教えください。
コメントありがとうございます。
【製作】のページに書いてある材料で作れますが、とりあえず雷を見るだけでいいのであれば、チャッカマン（１００均）だけでも十分可能です。
分解して中の導線を取り出し、その先端どうしを近づけた状態にして、スイッチを押せば光ります。
雷発生器を活用して樹種の発芽促進に活用
安価に自作出来る方法をお教えください
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