搜尋標籤: "toaster"
The Science of Colours of Light (English subtitles available)The programme is divided into 8 segments: 1. Illusion of light Interesting examples are used to illustrate colours of different objects in nature. A vivid description of how Issac Newton discovered…
ronson@hkecl.net
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家用電器本節目分成六個部分。 1. 電流的熱效應 示範當電流通過電阻線時，電阻線會發出熱和光。當電流通過電阻線時，電能會轉換成熱能。這種現象稱為電流熱效應。 金屬線的電阻越大，所產生的熱效應就越强烈。 電阻大的金屬線，稱為電阻線。由於電阻線會發熱，所以又俗稱發熱線。 2. 應用電流熱效應的家用電器 介紹各種日常應用電流熱效應的家用電器。包括電暖爐、風筒、電暖風機、多士爐、電熨斗和電飯煲等。 3.…
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Domestic Electrical Appliances (English subtitles available)This programme is divisible into 6 segments as follows: 1. Heating effect of current Experiment was carried out to demonstrate that when a current passes through a resistor, the resistor will glow…
ronson@hkecl.net
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472 次播放
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