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Three point charges +q, -2q and +q are p...

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)` 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 line joining points (x=0,y=0,z=0) and (z=a , y=a ,z=0)

Text Solution

Verified by Experts

The correct Answer is:
C
Magnitude`=sqrt(p^(2)+p^(2))=sqrt(2)p=sqrt(2)qa`
Direction is shown in figure
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