Question

Three charges $+2q,-q$ and $-q$ are placed at pooul $A$ $(a,0),B(a,a)$ and $C(-a,$ a) respectively in $x^2-y$ plane. The magnitude of net electric dipole moment of the system will be

• A. $\sqrt{11}qa$
• B. $q$
• C. 3$qa$
• D. $\sqrt{4}qa$

Answer 1

The correct option is D $\sqrt{4}qa$

Three charges $=+2q,-q$ and $-q$.

poul $A(a,0)$

$B(a,a)$

$C(-a,a)$ respectively

$x^2-y$

The magnitude of net electric dipole moment $\sqrt{{9a}^2+{3a}^2}=\sqrt{11}a$

Now, the magnitude of net electric dipole moment of the system $=\sqrt{4q}a$.