Question

What are the properties of gaussian surface?

Answer 1

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Essential properties of Gaussian surface: (1) It should be closed surface so that a clear distinction can be made between points that are inside the surface, on the surface and outside the surface. (2) This surface must pass through the point where electric field is to be calculated.

Answer 2

Answer:

The Gaussian surface is an arbitrary closed surface in three-dimensional space through which flux of vector field ( the gravitational field or magnetic field) is calculated.

The examples of some valid Gaussian surfaces include the surface of sphere, cylinder, cube etc. Some surfaces cannot be used as Gaussian surfaces such as disc surface, square surface etc.

Essential properties of Gaussian surface:

(1) It should be closed surface so that a clear distinction can be made between points that are inside the surface, on the surface and outside the surface.

(2) This surface must pass through the point where electric field is to be calculated.

(3) The surface must have a shape according to the symmetry of the source, so that the field is normal to the surface at each point and constant in the magnitude.

(4) For a system of charges the Gaussian surface should not pass through any discrete charge. It is because the electric field at the location of any charge is not well defined. However, the Gaussian surface can pass through a continuous charge distribution.

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