Let’s discuss the question: the closed gaussian surface shown at right. We summarize all relevant answers in section Q&A of website Activegaliano.org in category: Blog Marketing. See more related questions in the comments below.

## Does a Gaussian surface have to be closed?

**A Gaussian surface (sometimes abbreviated as G.S.) is a closed surface** in three-dimensional space through which the flux of a vector field is calculated; usually the gravitational field, the electric field, or magnetic field.

## What is the flux through a closed Gaussian surface?

The flux of the electric field through any closed surface S (a Gaussian surface) is **equal to the net charge enclosed divided by the permittivity of free space**.

### The figure shows a closed gaussian surface in the shape of a cube of edge length

### Images related to the topicThe figure shows a closed gaussian surface in the shape of a cube of edge length

## Can flux through a closed Gaussian surface be zero?

So, **net zero flux represents there is no net charge inside a gaussian surface may be there are equal no of positive and negative charges resulting zero net charge**.

## What does Gaussian surface depend?

**net charge enclosed and permittivity of the medium**.net charge enclosed, permittivity of the medium and the size of the Gaussian surface.et charge enclosed only.

## Why is Gauss law applicable to closed surfaces?

Gauss’s law states that **flow through any closed surface is a measure of the total charge inside**. So, Gauss law is valid for closed surfaces. Gauss’s law is valid only for the symmetric body charge distribution such as spherical, cylindrical, plane symmetry. It is also a valid other medium such as dielectric medium.

## What is meant by closed surface in Gauss law?

Gauss Law states that **the total electric flux out of a closed surface is equal to the charge enclosed divided by the permittivity**. The electric flux in an area is defined as the electric field multiplied by the area of the surface projected in a plane and perpendicular to the field.

## How does Gauss law work?

**The total of the electric flux out of a closed surface is equal to the charge enclosed divided by the permittivity**. The electric flux through an area is defined as the electric field multiplied by the area of the surface projected in a plane perpendicular to the field.

## How do you find the Gaussian surface?

**Here are the steps to determine a Gaussian surface:**

- Step 1: Select the surface from a body or object. …
- Step 2: Check direction of electric field (E) …
- Step 3: Check the area vector (A) …
- Step 4: Check the angle between area vector (A) and electric field (E)

## What are the factors on which the electric flux through a closed surface depends?

**The electric flux through a closed Gaussian surface depends upon**

- A. Net charge enclosed and permitivity of the medium.
- B. Net charge closed permitivity of the medium and one size of the Gaussian surface.
- C. Net charge enclosed only.
- D. Permitivity of the medium only.

## Why electric flux is zero in a closed surface?

If there is no net charge within a closed surface, every field line directed into the surface continues through the interior and is directed outward elsewhere on the surface. **The negative flux just equals in magnitude the positive flux, so that the net, or total, electric flux is zero**.

## Why Gaussian surface encloses no charge?

It doesn’t means that the charge inside it zero. Basically, **total electric flux over the Gaussian surface is given by the algebraic sum of the charges enclosed by that surface**. In case, if the charge enclosed by the Gaussian surface is q and -q then electric flux is zero and net charge is zero.

### The figure shows a closed gaussian surface in the shape of a cube of edge length

### Images related to the topicThe figure shows a closed gaussian surface in the shape of a cube of edge length

## Why magnetic flux is zero in a closed surface?

**Because magnetic field lines are continuous loops, all closed surfaces have as many magnetic field lines going in as coming out**. Hence, the net magnetic flux through a closed surface is zero.

## How does the electric flux through a closed surface depend on the magnitude of surface area of the closed surface?

As per Gauss’s theorem in electrostatics, the electric flux through a surface **depends only on the amount of charge enclosed by the surface**. It does not depend on size and shape of the surface. Therefore, electric flux through the surface is the same for all figures.

## Does electric flux depend on the size of the Gaussian surface?

As per the Guess theorem in electrostatics, **electric flux does not depend on the shape or size of the surface**. The electric flux depends only on the charge enclosed by the surface.

## Is electric flux depends on Gaussian surface?

Solution : **Electric Flux only depends upon the amount of charge enclosed by Gaussian surface**.

## Is Gauss law true for all closed surfaces?

EXPLANATION: **Gauss’s law is true for any closed surface**, no matter what its shape or size.

## Can Gauss law be proved?

Strictly speaking, Gauss’s law cannot be derived from Coulomb’s law alone, since Coulomb’s law gives the electric field due to an individual point charge only. However, **Gauss’s law can be proven from Coulomb’s law if it is assumed, in addition, that the electric field obeys the superposition principle**.

## When can you use Gauss law?

Gauss’s law is usually used **in cases of symmetry (spherical/cylindrical/planar)** where we could determine that the electric field on a closed loop is constant on every point of it (dependent only on r) and fom there we could get it out of the integral.

## What is a closed surface in physics?

A closed surface is **a surface that is compact and without boundary**. Examples of closed surfaces include the sphere, the torus and the Klein bottle.

## What is Gaussian surface Class 12?

Gaussian surface is **an enclosed surface in a three dimensional space through which the flux of a vector field is calculated** (gravitational field, the electric field, or magnetic field.) Gaussian surface helps evaluate the electric field intensity due to symmetric charge distribution. Was this answer helpful? 4 (4) (12)

### 24.2 Gaussian Surfaces

### Images related to the topic24.2 Gaussian Surfaces

## Which of the following is not Gaussian surface?

The Gaussian surface must always be a closed surface. As we know that a sphere and a cube are the closed surface so these can be Gaussian surfaces. But the disc is a 2-dimensional shape that can’t be a closed surface, therefore **a disc** can’t be a Gaussian surface.

## What are the conditions stated in Gauss’s law?

**A gaussian surface must exist where the electric field is either parallel or perpendicular to the surface vector**. This makes the cosines in all the dot products equal to simply zero or one. The electric field that passes through the parts of the gaussian surface where the flux is non-zero has a constant magnitude.

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