1arey koi to reply karo
find flux through hemispherical surface in each case
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9 Answers
62This is a sphere right?
U need to tell where q is exactly. I think without knowing that, it is not solvable.. unless i am making a mistake..
62ok in this question do we need flux thru the curved surface or both..
if it is through both the surfaces.. then in first case net flux will be zero
in the 2nd case it will be -q/ε0
1q is near the centre
in first case it is outside the hemisphere
and in second case it is inside the hemisphere
black dot is charge q
62Yeah i figured that...
if it is through both the surfaces.. then in first case net flux will be zero
in the 2nd case it will be -q/ε0
62first case all the flux that enters from first surface will leave from the 2nd..
so no net flux..
in the 2nd case .. net flux emerging will be all the flux generated by a single charge q!
1ok someone pl tell me abt gauss law why is a gaussian surface used? do we assume the charges on its surface to b 0 or the electric field inside it to be zero?pl give an example...i missd many classes on it and was terribly frustrated with today's class
62no we do not assume charge on surface to be zero..
the basic funda is of the charge enclosed
We do not assume electic field to be zero either.
Why u are getting confused is because the electric field inside metal is zero (conductor)
These are 2 different things..
U need to know 2 things..
1) field and potential due to infinite plane of charge density sigma
2) filed and potential due to a shell
(Derivation is must (not by first principle).. and must remember as well)
Realise what symmetry is..
And the basic definition of flux!
that is all :)