A) \[\frac{3q}{{{\varepsilon }_{o}}}\]
B) zero
C) \[\frac{2q}{{{\varepsilon }_{o}}}\]
D) \[\frac{q}{{{\varepsilon }_{o}}}\]
Correct Answer: B
Solution :
Charges present outside the surface make no contribution of electric flux. \[\therefore \] \[\phi =\frac{q}{{{\varepsilon }_{0}}}-\frac{q}{{{\varepsilon }_{0}}}=0\]
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