An equilateral triangle wire frame of side \( L \) having 3 point charges at its vertices is kep...

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An equilateral triangle wire frame of side \( L \) having 3 point charges at its vertices is kept in \( \mathrm{x} \)-y plane as shown. Component of electric field due to the configuration in \( \mathrm{z} \) direction at \( (0,0, \mathrm{~L}) \) is [origin is centroid of triangle]
(A) \( \frac{9 \sqrt{3} \mathrm{kq}}{8 \mathrm{~L}^{2}} \)
(B) zero
(C) \( \frac{9 \mathrm{kq}}{8 \mathrm{~L}^{2}} \)
(D) None
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