三電荷間的總電位能為何?
回答 (1)
2015-09-13 12:04 pm
✔ 最佳答案
U1 = -2k*Q^2/aU2 = -2k*Q^2/a
U3 = +k*Q^2/a
U = U1 + U2 + U3
= -3kQ^2/a
= (2)
收錄日期: 2021-04-21 14:11:23
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20150911220100AA5NVTZ