I WROTE DEFINITION OF ELECTRIC DIPOLE AS”IT IS AN ASSEMBLY OF TWO EQUAL AND OPPOSITE CHARGES HAVING FIXED AND FINITE SEPARATION”THE TEACHER SAID THAT THIS IS WRONG .THE WORD ASSEMBLY IS WRONG.IS HE CORRECT?PLEASE GUIDE ME.

Dear student 

Any two point charges which are equal in magnitude but have opposite signs and are separated by a small distance are said to be “electric dipole”In the diagram, if -q and +q are two charges having equal magnitude and departed by a distance “d”

Then,this system forms an electric dipole

Here p=qd is called the dipole moment,which is the measure of effect of electric dipole, and is a vector quantity which is directed from the negative charge to the positive charge of the dipole