Electrostatic Field on Martin‘s Physics Clubhttps://martinphysics.club/tags/electrostatic-field/Recent content in Electrostatic Field on Martin‘s Physics ClubHugoen-US2020-2026 martinphysics.clubThu, 20 Aug 2026 07:36:52 +0000求一均匀带电棒在真空中无限长带电导线的受力https://martinphysics.club/posts/wp-100012/Thu, 26 Mar 2020 05:38:12 +0000https://martinphysics.club/posts/wp-100012/<p>题目：真空中有一无限长带电导线，其电荷线密度为。相距导线长度a处有一长为L的均匀带电棒AB，电荷量为Q，求AB棒的受力。</p> <img src="https://martinphysics.club/images/posts/1-e1586271199552.png" alt="1-e1586271199552" loading="lazy" decoding="async"> <p>思路：微元法，先求场强分布，再求棒上的力元，再积分。</p>