question_answer

Three points charges\[+q,\,-2q\]and\[+q\]are placed at points (x = 0, y = a, z = 0), (x = 0, y = 0, z = 0) and (x = a, y = 0, z = 0), respectively. The magnitude and direction of the electric dipole moment vector of this charge assembly are

A)  \[\sqrt{2}qa\] along + y direction

B)  \[\sqrt{2}qa\] along the line joining points (x = 0, y = 0, z = 0) and (x = a, y = a, z = 0)

C)  \[qa\] along the line joining points (x =0, y = 0, z = 0) and (x= a, y = a, z= 0)

D)  \[\sqrt{2}\,qa\] along + x direction