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Electrostatics question

2006 · Q130
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Electrostatics question

2006 · Q130

NEETPhysicsElectrostaticsMCQ+4 / −1
A square surface of side L metres is in the plane of the paper. A uniform electric field E→\overrightarrow EE (volt/m), also in the plane of the paper is limited only to the lower half of the square surface (see figure). The electric flux in SI inits associated with the surface is

AIPMT 2006 Physics - Electrostatics Question 40 English
  1. A
    EL2
  2. B
    EL2/2ε\varepsilonε0
  3. C
    EL2/2
  4. D
    zero
View written solutionFree

Correct answer: D

Electric flux, ϕE=∫E→.dS→{\phi _E} = \int {\overrightarrow E .d\overrightarrow S } ϕE​=∫E.dS

=∫EdScos⁡θ=∫EdScos⁡90o=0= \int {EdS\cos \theta } = \int {EdS\cos {{90}^o} = 0}=∫EdScosθ=∫EdScos90o=0

The lines are parallel to the surface.

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