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問問Master Joe
為甚麼按下按鈕，燈泡便會發亮？那裡大家先要明白甚麼是「電路」。電源提供能量給電子，推動電子沿住電路流動，便可形成「電流」，而電流能夠順利通過所有電子元件循環流動的話，就是「電路」。當電子經過燈泡，燈泡裡面的鎢絲會將電能轉化為光能和熱能，這樣燈泡便可發熱發亮。交通燈是一個道路設施，負責控制路面的交通情況，交通燈的電路是用「串聯」和「並聯」哪一種呢？為甚麼交通燈一定用上紅、黃、綠三色呢？ 神秘科學天才Professor WHY 向Master Joe 下戰書，以AI Joey 的安危威脅Master Joe 接受他的科學問題大考驗，這次他要考驗Master Joe對幅射的認識，到底Master Joe 能否營救到AI Joey 呢？
Video Length: 0
Date Found: May 07, 2011
Date Produced:
View Count: 4
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