Three point 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:-

Options

A. `sqrt(2)` qa along +x direction
B. `sqrt(2)` qa along + y direction
C. `sqrt(2)` qa along the line joining points (x = 0, y = 0, z = 0) and (x = a, y = a, z = 0)
D. qa along the joining points (x = 0, y = 0, z = 0) and (x = a, y = a, z = 0)

Answer

C