問題詳情
1.在 3 秒內將 10 庫侖的電荷由電位 10V 處移動到 50V 處，再從 50V 處移動到 30V 處，則總共作功多少焦耳？
參考答案
答案：B
難度：簡單0.792105
統計：A(177),B(1505),C(14),D(27),E(0)
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