[電磁] 96台聯大
96年台聯大第六題
附上網址
http://www.lib.nthu.edu.tw/library/department/ref/exam/96t/pdf/96A3A4A7.pdf
(C) 6. A charge q sits at the back corner of a cube, as shown.
The length of the edge of the cube is L and the permittivity
constant is ε. What is the flux of electric field E through
the shaded surface of the figure?
(A) 1 q (B) 1 q (C) 1 q (D) 1 q (E) 1 q
----- ----- ----- ----- -----
4 ε 6 ε 8 ε 10 ε 12 ε
我知道這題要用高斯來算
Q
Φ = ---
ε
q 1
解答上是寫說Φ = (---)(---)
ε 8
但是想了老半天終究還是不懂為什麼要乘上1/8阿??
百思不得其解
懇請大大解惑~~
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