[題目] 電動力學Jackson problems 3.2
[領域] 電動力學 (題目相關領域)
[來源] JACKSON 3ED (課本習題、考古題、參考書...)
[題目] A spherical surface of R has charge uniformly distributed over its
surface with a density Q/4π(R^2),except for a spherical cap at the
north pole,define by the cone θ=α
[瓶頸] 我腦中畫不出題目所描述的圖..........(寫寫自己的想法，方便大家為你解答)
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