Question

Electric charge Q, Q and - 2 Q respectively are place at the three corner of an equilateral triangle of side a. Magnitude of the electric dipole moment of the system is:

Answer 1

ANSWER WILL BE :QA$\sqrt 3$

Configuration of charges:

Imagine charges at C(−2Q) be splited into charges of (−Q) each so that (AC) and (BC) form two dipole systems.

Now, dipole moment:

P  1  =QA=p2

using vector addition

 ∣  Pnet ∣= in roots  of p1  squre +p2 squre + 2 * p1 *p2 cos theta     [θ=60]

p  net =QAroot 3

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