Question

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:-

• A. $\sqrt{2}qaalong+xdirection$
• B. $\sqrt{2}qaalong+ydirection$
• C. $\sqrt{2}qaalongthelinejoiningpoints$
  (x = 0, y = 0, z = 0) and (x = a, y = a, z = 0)
• D. qa along the line joining points
  (x = 0, y = 0, z = 0) and (x = a, y = a, z = 0 )

Answer 1

The correct option is C $\sqrt{2}qaalongthelinejoiningpoints$

(x = 0, y = 0, z = 0) and (x = a, y = a, z = 0)
$Magnitute=\sqrt{P^2+P^2}=\sqrt{2P}=\sqrt{2qa}$