A) zero
B) \[2q.4\pi {{R}^{2}}\]
C) \[\frac{q}{{{\varepsilon }_{0}}}\]
D) \[\frac{2q}{{{\varepsilon }_{0}}}\]
Correct Answer: A
Solution :
[a] According to the Gauss's law, the net electric flux through the closed spherical surface is equal to the total charge enclosed by the surface divided by \[{{\varepsilon }_{0}},\] i.e., \[{{\phi }_{E}}=\frac{-q+q}{{{\varepsilon }_{0}}}=0\]
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