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Electric flux Φ through a closed surface enclosing total charge Q_enc (Gauss's law) equals:
AQ_enc · ε₀
BQ_enc / ε₀
CQ_enc / (4πε₀)
Dε₀ / Q_enc
Answer & Solution
Correct answer: B. Q_enc / ε₀
1. Gauss's law: ∮ E · dA = Q_enc / ε₀.
2. Works for ANY closed surface (Gaussian surface).
3. Only charge ENCLOSED contributes; outside charges have zero net flux.
_Source: NCERT Class 12 Physics Ch 1 §1.10 Gauss's Law_
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