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Electrostatics question

2023 · Q152
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Electrostatics question

2023 · Q152

NEETPhysicsElectrostaticsMCQ+4 / −1

If ∮sE⃗⋅dS→=0\oint\limits_{s} \vec{E} \cdot \overrightarrow{d S}=0s∮​E⋅dS=0 over a surface, then:

  1. A
    the magnitude of electric field on the surface is constant.
  2. B
    all the charges must necessarily be inside the surface.
  3. C
    the electric field inside the surface is necessarily uniform.
  4. D
    the number of flux lines entering the surface must be equal to the number of flux lines leaving it.
View written solutionFree

Correct answer: D

$$\phi_{\mathrm{closed}}=0$$

So, $$\mathrm{\phi_{in}=\phi_{out}}$$

NEET 2023 Physics - Electrostatics Question 11 English Explanation

Number of field lines entering is equal number of field lines leaving.

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