Three equal charges, each \( +q \), are placed on the corners of an equilateral triangle. The el...

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Three equal charges, each \( +q \), are placed on the corners of an equilateral triangle. The electric field intensity at the centroid of the triangle is
(1) \( k q / r^{2} \)
(2) \( 3 \mathrm{kq} / \mathrm{r}^{2} \)
(3) \( \sqrt{3} \mathrm{kq} / \mathrm{r}^{2} \)
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