March 2023
Intermediate
240 pages
7h 3m
Japanese
Content preview from 図解まるわかり 電池のしくみ
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36
11円を積み重ねて、コイン電堆を作ってみよう
ボルタ電堆（1-5）とは、銅板と亜鉛板の間に塩水を染み込ませたスポ
イン状物質をはさんだものでした。そこで銅板の代わりに10 円玉、亜鉛
板の代わりにアルミ製の1 円玉を使って、自宅でコイン電堆を作ってみま
しょう。一体いくらかかるでしょうか？
用意するもの
・10 円玉7～10 枚（できればピカピカのもの） ・実験用電子オルゴール
・1円玉7～10枚
・リ ード 線
・キッチンペーパー
・食塩水（塩化ナトリウム水溶液）
やり方
❶鍋にお湯を沸かして、溶かせるだけの塩を入れて、濃い目の食塩水を作
ります。冷めたら、あらかじめ10 円玉と同じサイズにカットしたキッ
チンペーパーを浸して、滴が落ちない程度に絞ります。
❷10 円玉の上に食塩水を
浸したキッチンペーパ
ー、さらに1円玉を重ね
ます。この11円の組み
合わせを7 個ぐらい重ね
たら、電子オルゴール
の負極を1 円玉、正極を
10 円玉につないでみて、
音が鳴るかどうか確認
してみましょう。
❸音が鳴らない場合は、さ
らに11円の組み合わせ
を増やしてください。
やってみよう
1円玉
Al
NaCl
Cu
10円玉
負極
正極
電子
オルゴール
キッチン
ペーパー
キッチン
ペーパー
e
‑
+
−
e
‑
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O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.Julian F.
I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.Amir M.
I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.