Electric Charges and Fields - Result Question 38

38. A square surface of side L meter in the plane of the paper is placed in a uniform electric field E (volt /m ) acting along the same plane at an angle θ with the horizontal side of the square as shown in Figure. The electric flux linked to the surface, in units of volt. m, is

[2010]

(a) EL2

(b) EL2cos⁡θ

(c) EL2sin⁡θ

(d) zero

Show Answer

Answer:

Correct Answer: 38. (d)

Solution:

  1. (d) Electric flux, ϕ=EAcos⁡θ, where θ = angle between E and normal to the surface.

Here θ=π2

⇒ϕ=0

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