Draw electric field by negative charge.

Draw electric field lines of simple charge distribution.

Draw electric field lines of positive charge.

Explain electric field and also electric field is point charge.

Write equation of electric field by point charge How does it depend on distance ?

Write the relation between the electric field of an electric charge and electrostatic potential at any point

Difference between electric field of point charge and electric field of a dipole.

In electric dipole is placed in an electric field of a point charge, then........

An electric dipole is placed in an uniform electric field of a point charge, then ........

Write equation of electric field by system of 'n' charges.

Five charges, q each are placed at the corners of a regular pentagon of side 'a' as in figure: (a) (i) What will be the electric field at O, the centre of the pentagon ? (ii) What will be the electric field at O if the charge from one of the corners (say A) is removed ? (iii) What will be the electric field at O if the charge q at A is replaced by -q ? (b) How would your answer to (a) be affected if pentagon is replaced by n-sided regular polygon with charge q at each of its corners ?