# Best answer: What is the electric flux through a closed surface with a charge q placed at its Centre?

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## What is the electric flux through the cube if a charge Q is placed at its Centre?

As the charge is symmetrically positioned on each face of the square, the electrical flux flowing through each face is proportional to the \${dfrac{1}{6}^{th}}\$ of the total flux. Hence, the electric flux passing through each face to the cube is \$dfrac{q}{{6{varepsilon _ circ }}}\$.

## What is the electric flux through the closed surface?

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.

## When a charge Q is outside the closed surface then the total electric flux passing through the closed surface is?

Gauss law: The electric flux passing through any closed surface is equal to the total charge enclosed by the surface.

## Is the flux through a closed surface always zero?

The flux of a vector field through a closed surface is always zero if there is no source of the vector field in the volume enclosed by the surface.

## How does the electric flux due to a point charge?

How does the electric flux due to a point charge enclosed by a spherical Gaussian surface get affected when its radius is increased? … That is, on increasing the radius of the gaussian surface, charge q remains unchanged. So, flux through the gaussian surface will not be affected when its radius is increased.

## At what condition electric flux is zero?

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.

## What happens to the field if you have charges outside the closed surface?

No; zero field could be caused by charges outside of the surface as well as inside the surface.

## What will be the electric flux through a closed surface if its size is doubled?

By Gauss’ theorem ϕE=∫→E. d→S=qε0 ϕE∝∫dS ∴ Flux will also doubled, ie, .

## Is the electric flux at the surface A2 is zero or non zero?

The flux thru element A2 is zero.

## What factors determine how much electric flux passes through a surface?

The electric flux through a surface is proportional to the number of field lines crossing that surface. Note that this means the magnitude is proportional to the portion of the field perpendicular to the area.

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