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Asked in GSEB Board July 2016 · Gauss's law and enclosed charge
Idea: Gauss's law, ∮⃗E· d⃗A=(qᵢₙ)/(ε₀), counts only the charge inside the closed surface.
The sphere is placed near P, not around it, so the charge Q at P lies outside the sphere: qᵢₙ=0.
Every field line from Q that enters the sphere on the near side leaves it again on the far side, so the inward and outward flux cancel.
Total flux =0/(ε₀)= zero.
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