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In finding the electric field using Gauss law, the formula   is applicable. In the formula, ε0 is permittivity of free space, A is the area of Gaussian surface and qenc is charge enclosed by the Gaussian surface. This equation can be used in which of the following situations?
  • a)
    Only when the Gaussian surface is an equipotential surface and   is constant on the surface
  • b)
    Only when  is constant on the surface
  • c)
    Only when the Gaussian surface is an equipotential surface
  • d)
    For any choice of Gaussian surface
Correct answer is option 'A'. Can you explain this answer?
Most Upvoted Answer
In finding the electric field using Gauss law, the formulais applicabl...
According to Gauss's Law,

Where  is the electric field and  is the elemental.
areal vector for any small elemental area on the gaussian surface.

Given that the formula 

This relation will be valid when  is a constant and  and also when θ = 0°

The condition θ = 0 means that the components of electric field parallel to the elemental surface ara E1 sin θ = 0.
This means that the potential gradient over the surface is zero. Hence the surface is equipotential.
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In finding the electric field using Gauss law, the formulais applicable. In the formula, ε0is permittivity of free space, A is the area of Gaussian surface and qenc is charge enclosed by the Gaussian surface. This equation can be used in which of the following situations?a)Only when the Gaussian surface is an equipotential surface andis constant on the surfaceb)Only whenis constant on the surfacec)Only when the Gaussian surface is an equipotential surfaced)For any choice of Gaussian surfaceCorrect answer is option 'A'. Can you explain this answer?
Question Description
In finding the electric field using Gauss law, the formulais applicable. In the formula, ε0is permittivity of free space, A is the area of Gaussian surface and qenc is charge enclosed by the Gaussian surface. This equation can be used in which of the following situations?a)Only when the Gaussian surface is an equipotential surface andis constant on the surfaceb)Only whenis constant on the surfacec)Only when the Gaussian surface is an equipotential surfaced)For any choice of Gaussian surfaceCorrect answer is option 'A'. Can you explain this answer? for JEE 2025 is part of JEE preparation. The Question and answers have been prepared according to the JEE exam syllabus. Information about In finding the electric field using Gauss law, the formulais applicable. In the formula, ε0is permittivity of free space, A is the area of Gaussian surface and qenc is charge enclosed by the Gaussian surface. This equation can be used in which of the following situations?a)Only when the Gaussian surface is an equipotential surface andis constant on the surfaceb)Only whenis constant on the surfacec)Only when the Gaussian surface is an equipotential surfaced)For any choice of Gaussian surfaceCorrect answer is option 'A'. Can you explain this answer? covers all topics & solutions for JEE 2025 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for In finding the electric field using Gauss law, the formulais applicable. In the formula, ε0is permittivity of free space, A is the area of Gaussian surface and qenc is charge enclosed by the Gaussian surface. This equation can be used in which of the following situations?a)Only when the Gaussian surface is an equipotential surface andis constant on the surfaceb)Only whenis constant on the surfacec)Only when the Gaussian surface is an equipotential surfaced)For any choice of Gaussian surfaceCorrect answer is option 'A'. Can you explain this answer?.
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