This test paper is useful for the students studying in class 12th.Chapter included in this paper is only electrostatics ( Both chapter-1 and chapter-2 of NCERT).
. State Gauss’s law . Using this law derive an expression for the electric field due to a (1) uniformly charged infinite charged plane sheet, (2) charged spherical shell, (3) infinite long charged wire of linear charge density λ.
7. S1 and S2 are two hollow concentric spheres enclosing charges Q and 2Q respectively as shown in fig. (1) what is the ratio of electric flux through S1 and S2 . (2) How will the electric flux through S1 chenges if a medium of dielectric constant 5 is introduced in the space inside S1 in place of air.