
Which of the following statements are correct?
(a) The density of electric lines of force at a point is independent of the magnitude of electric field intensity vector at that point.
(b) The density of electric lines of force at a point is proportional to the magnitude of electric field intensity vector at that point.
(c) Actually, the electric field lines do not exist. This is just a graphical description of the electric field.
(d) Actually, the electric field lines exist.
(b) The density of electric lines of force at a point is proportional to the magnitude of electric field intensity vector at that point.
(c) Actually, the electric field lines do not exist. This is just a graphical description of the electric field.
(d) Actually, the electric field lines exist.


Important Questions on Electrostatics


Electric field is given by . Electric flux through surfaces of area layer in plane, plane and plane are in ratio


A conic surface is placed in a uniform electric field as shown in the figure such that the field is perpendicular to the surface on the side . The base of the cone is of the radius , and the height of the cone is . The angle of the cone is . Find the magnitude of the flux that enters the cone’s curved surface from the left side. Do not count the outgoing flux .

The figure below shows an imaginary cube of side A uniformly charged rod of length moves towards the right at a constant speed At the right end of the rod just touches the left face of the cube. Plot a graph between electric flux passing through the cube versus time .


A graph of the component of the electric field as a function of in a region of space is shown. The and components of the electric field are zero in this region. If the electric potential is at the origin, then the potential at is

