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Q.

Determine the electric dipole moment of the system of three charges, placed on the vertices of an equilateral triangle, as shown in the figure :

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a

3qlj^−i^2

b

(ql)i^−j^2

c

2qlj^

d

−3qlj^

answer is D.

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Detailed Solution

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Dipole moment
= charge × distance between two charges

P1=q(l)P2=ql

∣ Resultant∣=2Pcos⁡30∘

2ql32=3ql

 So, P→Resultant=−3qlj^

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