Gauss's law is ∮ 𝐄·d𝐀 = Q/ε₀, where Q is the net charge enclosed by the Gaussian surface. If Q = 0, then:
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Gauss's law is ∮ 𝐄·d𝐀 = Q/ε₀, where Q is the net charge enclosed by the Gaussian surface. If Q = 0, then:

G1 Physics · Accepted Answer

From Gauss's law, the net flux is Φ = Q/ε₀. For Q = 0, Φ = 0. This does not require the electric field to be zero at every point; positive and negative flux contributions may cancel. Therefore the number of field lines entering the closed surface equals the number leaving it. Correct answer: B.