If ∮ S E → · d S → = 0 over a surface, then:

If ∮S E→·dS→=0 over a surface, then:
  1. The electric field inside the surface is necessarily uniform.
  2. The number of flux lines entering the surface must be equal to the number of flux lines leaving it.
  3. The magnitude of electric field on the surface is constant.
  4. All the charges must necessarily be inside the surface.

Solution

The electric flux through a surface is the surface integral of the normal component of the electric field E over that surface. As net flux given by,∮S E→·dS→=0, therefore total number of flux lines entering the surface must be equal to the number of flux lines leaving it.

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Asked in: NEET 2023 (All India)

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