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A K

^-Can anyone plz tell me clearly the cases when to use

/2

₀

or

/

_⁰

for eg in the below question :

A large conducting plane has a surface charge density of 10^-4 C/m^2

.Find the electrostatic energy stored in a cubical voulme of edge 1cm.

which one to use?

and why??

Anshuman Johri

sigma / epsilon is used when a thick block (that has some thickness) is given and sigma / 2 epsilon is used when a plane sheet is given (which has negligible thickness.

Here a plane conducting surface is given so u need to use sigma / 2 epsilon.

If it is given a large thick conducting plane then use sigma / epsilon.

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