A point negative charge \( -Q \) is placed at a distance \( r \) from a dipole with dipole momen...

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A point negative charge \( -Q \) is placed at a distance \( r \) from a dipole with dipole moment \( P \) in the \( x y \) plane as shown in figure. The \( x \)-component of force acting on the charge \( -Q \) is
(1) \( -\frac{P k Q}{r} \cos \theta \hat{i} \)
(2) \( \frac{P k Q}{r} \cos \theta \hat{i} \)
(3) \( -\frac{2 P k Q}{r^{3}} \cos \theta \hat{i} \)
(4) \( \frac{2 P k Q}{r^{3}} \cos \theta \hat{i} \)
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