[問題] 電學
(1)
已知跨過細長圓柱體的電壓V,同時通過此物體電流為I,根據歐姆定律可以知道
此圓柱電阻為 R = V/I
我覺得是對耶
但是為什麼是錯的???
歐姆定律說,電阻兩端的電壓通過電阻會與通過的電流成正比
上述完全沒錯阿!
(2)
電池為什麼串聯時,電動勢是累加的??
並聯的時候,總電動勢為何會等於單獨一個電池的電動勢呢???
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