Electric Charge...

A charge q is placed at one corner of a cube. The electrons flux through any of the three faces adjacent to the charge is zero. The flux through any one of the other three is

The surface density of charge on a very large flat metal plate is $$2.25 \times 10^{-9} coul/m^2$$. The intensity of electric field at a point at a distance 20 cm from the middle part of plate is 

A long cylindrical conductor, of radius  $$5\mathrm { mm }$$  and placed in a medium of permittivity  $$55.55\mathrm { pF } / \mathrm { m } ,$$  has surface charge density of  $$2\mu \mathrm { C } / \mathrm { m } ^ { 2 } .$$  The magnitude of the electric intensity at a point  $$2\mathrm { m }$$  from its axis is nearly

A current $$I$$ flows through a cylindrical rod of uniform cross-section area $$A$$ and resistivity $$\rho$$. The electric flux through the shaded cross-section of rod as shown in figure is :

The  electric flux through the  surface 

Two points charges $$+q_{1}$$ and $$+q_{2}$$ are placed at a certain distance apart, then

A charged particle $$q$$ is placed at the centre $$O$$ of a cube of length $$L(A\ B\ C\ D\ E\ F\ G\ H)$$. Another same charge $$q$$ is placed at a distance $$L$$ from $$O$$. Then the electric flux through $$ABCD$$.

The electric lines of force are represented by the equation $$x^2+y^2=1$$. A unit positive charge initially at rest at point $$(1,0)$$ will move.

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Electrostatic experiment is

In the following diagrams, all the charges have equal magnitude. Electric field is zero at the centre of