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In many situations, to find the electric field using the gauss law, we can use the simplified equation E → = q enclosed ε 0 A → , where ε 0 is the permittivity of free space, A is the area of Gaussian surface and q enclosed is the net charge enclosed by the Gaussian surface. Among the following situations, this equation can be used

Options

  1. Aonly when the Gaussian surface is an equipotential surface
  2. Bonly when E → is constant on the surface
  3. Conly when the Gaussian surface is an equipotential surface and E → is constant of the surface
  4. Dfor any choice of Gaussian surface

Correct answer

C. only when the Gaussian surface is an equipotential surface and E → is constant of the surface

Step-by-step solution

Magnitude of electric field is constant & the surface is equipotential

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