Draw the pattern of electric field lines, when a point charge -Q is kept near an unchanged conducting plates.

Show that the electric field due to a point charge is conservative?

Obtain expression for electric field due to a point charge

Sketch the electric lines of force due to point charges q > 0

Sketch the electric lines of force due to point charges q < 0

sketch the pattern of electric field lines due to a conducting sphere having negative harge on it and an electric dipole.

Draw the electric field lines due to a uniformly charged thin spherical shell when charge on the shell is positive?

Graphically, represent the variation of electric field due to a point charge Q with magnitude of charge Q