Placeholder Image

字幕列表 影片播放

  • Smart Learning for All

  • Topic: Earthing.

  • Why do buildings have lightning rods?

  • I know.

  • They are used to dry clothes.

  • No.

  • They are used for earthing.

  • Earthing means digging the earth, right?

  • No.

  • Earthing is the process of transferring charge from a charged object to the earth.

  • It is done with the help of this lightning rod.

  • A lightning rod is a metal rod whose lower end is fixed to a copper plate.

  • Buried deep in the earth while upper end has spikes.

  • But why is it called a lightning rod?

  • This is because it protects us from lightning.

  • Lightning is a flow of massive charge.

  • It can damage an entire building and harm the people living in it.

  • Hence, to protect them.

  • The lightning rod transfers the massive charge from the lightning to the earth safely.

  • For more educational videos please visit http://www.SmartLearningforAll.com

  • Also, don't forget to subscribe to our YouTube channel.

Smart Learning for All

字幕與單字

影片操作 你可以在這邊進行「影片」的調整,以及「字幕」的顯示

B1 中級 美國腔

接地 - 為什麼建築物有避雷針?| 避雷針--#aumsum (Earthing - Why do buildings have lightning rods? | #aumsum)

  • 10 1
    AumSum 發佈於 2021 年 01 月 14 日
影片單字