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木は電気を通すのか?その背景をご紹介します - Practical Tips

木は電気を通すのか?その背景をご紹介します

by Tobias

木は電気を通すことが知られていません。しかし、特定の状況下では、それが可能です。木材が電気を通すかどうか、どのような場合に電気を通すかを解説します。

だから木は電気を通すんだ – ある条件下では

原理的には、木材は絶縁体、つまりゴムやプラスチックのように電気を非常に悪くしか通さない素材に属します。しかし、木であっても電気を通すことは可能なのです。

  • 木は空気よりも伝導性が高いため、例えば雷も木に落ちることで電気を通します。
  • 乾燥した木は電気を通しません。しかし、水は電気を通すので、湿った木材は低電圧で電気を通すことになり、位相計で検査することができます。
  • とはいえ、磁石にも使われる金属に比べ、木材は導電性に乏しい。
  • 木材は、ゴムなどの絶縁材料に比べ、絶縁性も良くありません。

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