[問題] 台電物理的題目求助
小弟物理初學者
有關21題
小弟知道v=IR跟R=pL/A
題目有給導線長30cm
但是怎麼沒給截面積呢
求高手指點計算過程
答案是B
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推
06/13 11:55, , 1F
06/13 11:55, 1F
推
06/13 12:12, , 2F
06/13 12:12, 2F
※ 編輯: a0911961937 (115.43.12.241), 06/13/2016 12:21:38
※ 編輯: a0911961937 (115.43.12.241), 06/13/2016 12:24:49
推
06/13 12:32, , 3F
06/13 12:32, 3F
→
06/13 12:50, , 4F
06/13 12:50, 4F
推
06/13 14:20, , 5F
06/13 14:20, 5F
推
06/13 14:23, , 6F
06/13 14:23, 6F
→
06/13 14:23, , 7F
06/13 14:23, 7F
→
06/13 20:49, , 8F
06/13 20:49, 8F
推
06/17 00:23, , 9F
06/17 00:23, 9F
推
06/17 00:28, , 10F
06/17 00:28, 10F
→
06/17 00:30, , 11F
06/17 00:30, 11F