File:【中央大學】物理演示實驗－太空漫步 "Spacewalk" of a magnet, Lenzs law.webm

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Original file ‎(WebM audio/video file, VP8/Vorbis, length 1 min 11 s, 854 × 470 pixels, 716 kbps overall, file size: 6.04 MB)

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中文：目的

瞭解磁鐵與金屬有相對運動時，如何產生渦電流(eddy surrent)，以及楞次定律(lenz law)如何解釋磁煞車效應。

實驗 實驗裝置：約一米長的鋁管一枝，垂直站立。強力磁鐵(neodymium magnet, 釹鐵硼磁鐵)、乒乓球各一只。 讓乒乓球在鋁管中自由下落，觀察下落的情形。 讓強力磁鐵在鋁管中自由下落，觀察下落的情形。 比較兩實驗的差別。

原理思考 為什麼掉落的速度會有差別呢？

更多資訊請參考https://goo.gl/aELQsu

歡迎聯絡我們：ncusciedu@g.ncu.edu.tw（中央大學科學教育中心）
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Source YouTube: 【中央大學】物理演示實驗－太空漫步 "Spacewalk" of a magnet, Lenzs law – View/save archived versions on archive.org and archive.today
Author 中央大學科學教育中心活動頻道

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This file, which was originally posted to YouTube: 【中央大學】物理演示實驗－太空漫步 "Spacewalk" of a magnet, Lenzs law – View/save archived versions on archive.org and archive.today, was reviewed on 28 June 2018 by reviewer Explicit, who confirmed that it was available there under the stated license on that date.

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Date/TimeThumbnailDimensionsUserComment
current13:32, 18 May 20181 min 11 s, 854 × 470 (6.04 MB)Vislupus (talk | contribs)Imported media from https://www.youtube.com/watch?v=o_NVdZfAaT0

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Format Bitrate Download Status Encode time
VP9 480P 585 kbps Completed 15:56, 1 November 2018 1 min 32 s
Streaming 480p (VP9) Not ready Unknown status
VP9 360P 317 kbps Completed 15:55, 1 November 2018 1 min 5 s
Streaming 360p (VP9) Not ready Unknown status
VP9 240P 190 kbps Completed 15:55, 1 November 2018 54 s
Streaming 240p (VP9) 187 kbps Completed 03:42, 16 December 2023 2.0 s
WebM 360P 506 kbps Completed 13:33, 18 May 2018 47 s
Streaming 144p (MJPEG) 1.01 Mbps Completed 09:00, 20 November 2023 3.0 s
Stereo (Opus) 1 kbps Completed 14:06, 25 November 2023 1.0 s
Stereo (MP3) 128 kbps Completed 09:00, 20 November 2023 1.0 s

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