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) dipole moment vector of this charge assembly are :

Options

A. `sqrt(2q)`a along the line joining points .(x = 0,y = 0,z = 0)and(x = a,y = a,z = 0)
B. q a along the line joining points
C. `sqrt2q` a along + x direction
D. `sqrt2q` a along y direction

Answer

A