Question

Point charges q, q, -2q are placed at the corners of an equilateral triangle ABC of side l. The magnitude of net electric dipole moment of the system is

• A. $ql$
• B. $2ql$
• C. $\sqrt{3}ql$
• D. $4ql$

Answer 1

The correct option is C $\sqrt{3}ql$



$P_{net}=\sqrt{p^2+p^2+2ppcos{60}^{\circ }}=\sqrt{3}p=\sqrt{3}ql$ $(\because p=ql)$