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Four point charges 1μC,-2μC,3μC  and -2μC  are arranged on the four vertices of a square of side 1 cm.  The dipole moment of this charge assembly is

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By Expert Faculty of Sri Chaitanya
a
Zero
b
2×10-8C.m
c
22×10-8C.m
d
2×10-8C.m
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detailed solution

Correct option is B

p→=∑qiri→ we can rearrange the charges to form three dipoles with charges as  (-2 and +2) ,(+1 and _1) and (-1 and +1) with first and third in opposite direction and second one is perpendicular to them.


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Three electric dipoles p1, p2  and p3 are placed along three sides of on equilateral triangle ABC as shown in figure If p1= p2  = p3=pand the dipole p3 is removed from the system, then the resultant dipole moment of the system will be

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