※ [本文转录自 Grad-ProbAsk 看板] 作者: askaskaskask (问问题) 看板: Grad-ProbAsk 标题: [问题] 请问一个电磁学的问题 时间: Thu Mar 6 02:08:41 2008 1. A conducting sphere of radius R is charge to a potential V and spun about a diameter at an angular velocity ω a) What's the surface current density ? b) What's the magnetic induction at the center ? c) What's the magnetic dipole moment ? d) Wha's the numerical value of this magnetic induction for a sphere 10.0cm in radius , charged to 10.0 kilovolts ,and spinning at 1.00x10^4 turns/min 想请问一下这个题目如何做??谢谢 希望大家可以帮忙依下，不会做，不过看题目感觉不难，拜托拜托，大家解救一下小弟吧 --

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※ 发信站: 批踢踢实业坊(ptt.cc) ◆ From: 118.170.56.91