First slide

Dipole

Question

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

NA

Solution

$|P_{1}| = q (l) |P_{2}| = q (l) R e s u l \tan t = 2 P \cos θ / 2 R e s u l \tan t = 2 P \cos 30^{0} (i n - y d i r e c t i o n) = 2 P (\frac{\sqrt{3}}{2}) (- \hat{j}) = \sqrt{3} P (- \hat{j}) = \sqrt{3} q l (- \hat{j})$

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