Three charges +2q, +3q and -4q are situated at (0,-3a), (2a,0) and (-2a,0) respectively in the xy plane. The resultant dipole moment about the origin is .

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(3) 2qa(7̂i-3̂j). For a set of point charges the dipole moment about a chosen origin is ⃗p=Σ qᵢ⃗rᵢ, the position vectors running from the origin to each charge. +2q at (0,-3a): 2q(0̂i-3âj)=-6qa ̂j. +3q at (2a,0): 3q(2âi)=6qa ̂i. -4q at (-2a,0): (-4q)(-2âi)=+8qa ̂i. Adding, ⃗p=14qa ̂i-6qa ̂j=2qa(7̂i-3̂j).

Three charges +2q, +3q and -4q are situated at (0,-3a), (2a,0) and (-2a,0) respectively in the xy plane. The resultant dipole moment about the origin is ______.

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