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Physics · PYQ NEET UG 2023
हिन्दीIf \( \oint_S \vec{E} \cdot d\vec{S} = 0 \) over a surface, then :
Correct answer · Option 3
the number of flux lines entering the surface must be equal to the number of flux lines leaving it.
Explanation
According to Gauss's law, total flux \( \oint \vec{E} \cdot d\vec{S} = q_{\text{enclosed}}/\varepsilon_0 = 0 \). This means net enclosed charge is zero, implying the flux entering equals the flux leaving the surface.
