A) \[E{{L}^{2}}/(2{{\varepsilon }_{0}})\]
B) \[E{{L}^{2}}/2\]
C) zero
D) \[E{{L}^{2}}\]
Correct Answer: C
Solution :
Electric flux \[({{\phi }_{e}})\]is a measure of the number of field lines crossing a surface. The number of field lines passing through unit area (N/A) will be proportional to the electric field, or, \[\frac{N}{A}\propto E\Rightarrow N\propto EA\] The quantity EA is the electric flux through surface S. In this problem, lines of force that enter the closed surface leave the surface, so no electric flux is bound to the system. Hence, electric flux is zero.You need to login to perform this action.
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