推 mttsaimark:請問本題求甚麼?V值?E值? 03/22 00:05
推 braceup:抱歉沒打好~求V~感恩~ 03/22 00:16
推 mttsaimark:請問是cylinder or sphere? 03/22 00:27
→ braceup:題目裡沒有提到@@ 03/22 00:29
推 braceup:可以麻煩就其中一種解釋嗎?非常感謝~ 03/22 00:33
Uniform surface charge density of 6 ans 2 nC/m^2 are present at ρ=2 and 6 cm,
respectively , in free space. Assume V=0 at ρ=4, and calculate at
(a)ρ＝5,
(b)ρ＝7
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