CBSE Class 12-science Answered
Calculate the total electric flux and flux related to each vertices for a cube of side a and charge q is placed at
(1) an end of cube
(2) a plane of cube
Asked by agarrajeev06 | 10 Jan, 2019, 05:02: PM
Expert Answer
Total Electric flux is related to closed surface of a given volume.
As per gauss's law total electric flux over a closed surface is q/ε , where q is the total charge enclosed inside the closed surface
and ε is permitivity of the enclosed medium.
Hence let us place a charge q inside a cube, then the total electric flux over a closed surface is q/ε .
Flux at a given point means , we need som area around the point. It is assumed required flux indicates the flux passing through this area.
Flux passing through the given area is product of electric field intensity and area of the surface, provided the electric field vector is normal to the surface.
If we consider that the charge is placed at A of the cube as shown in figure,
the flux passing through an area dA at point B, D and E = 
the flux passing through an area dA at point C, F and H = 
the flux passing through an area dA at point G = 
Answered by Thiyagarajan K | 12 Jan, 2019, 03:05: PM
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