Question

FIND THE ELECTRIC DIPOLE MOMENT OF THE SYSTEM,WHERE THE GIVEN TRIANGLE IS AN EQUILATERAL TRIANGLE

Answer 1

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)