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啊~~課本丟出這段文字是想說什麼?看不懂!? 電學問題

Aug 20th 2013, 07:05

當把電阻線剪一半, 然後並聯,
課本上解出其熱功率為原來的4倍, 但為什麼不如此做?

是因為如此的並聯接法, 造成電阻變小(1/2倍) , 電流變大(2倍) ,
容易造成電線發過多熱, 甚至熔斷, 電線走火的可能!
所以不能不考慮後果....

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