Three point charges `1muC ,1muC " and " -2muC` are placed at points having coordinates (0,1,0)cm, (1,0,0) cm and (0,0,0)cm respectively. The magnitude of electric dipole moment of the system is

Options

A. `10^(-8)Cm`
B. `sqrt(2)xx10^(-8) Cm`
C. `sqrt(3)xx10^(-8) Cm`
D. `2xx10^(-8) Cm`

Answer

B

Explanation

`vecp=q.vecI`

`|vecp_1|=|vecp_2|=qxxI`
`=10^(-6) xx10^(-2)`
`=10^(-8) Cm`
Now , `p=sqrt(p_1^2+p_2^2) = sqrt((10^(-8))^2+(10^(-8))^2)`
`=sqrt(2) xx106(-8)Cm`