If _ s E d S =0 over a surface, then:

Physics · NEET · NTA Exams — Electrostatics

If \(\oint_{s} \vec{E} \cdot \overrightarrow{d S}=0\) over a surface, then:

the electric field inside the surface is necessarily uniform
the number of flux lines entering the surface must be equal to the number of flux lines leaving it
the magnitude of electric field on the surface is constant
all the charge must necessarily be inside the surface

Answer

(B) the number of flux lines entering the surface must be equal to the number of flux lines leaving it

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