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charges q,q,-2q are placed at the corners of equilateral triangle of side l. what is the net dipole moment?
Ans root3 ql.
pl explain
let A,B,C are three vertices ...
charge at A,B is q but at C charge is -2q ...
A(q) ...................B(q)
C(-2q)
charge of C can be written as -q + -q
q charge of A & -q charge of C becomes 1 dipole ...
q charge of B & another -q charge of C makes another dipole ..
direction of dipole moments of both is rowards C .....
angle bw them will be 60o ...
now resultant = root(p2+p2+2p2cos60o) = root3 (P)
now , P = qL so resultant = root3(qL)
the answer of the question :the resultant dipole moment of 3 charges placed at the vertices of the triangle is root3qL or -root3 qL
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