A particle \( A \) of mass \( m \) and charge \( Q \) moves directly towards a fixed particle \(...

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A particle \( A \) of mass \( m \) and charge \( Q \) moves directly towards a fixed particle \( B \). Which has charge \( Q \). The speed of \( A \) is \( v \) when it is far away
\( \mathrm{P} \) from \( B \). The minimum separation between the particle is proportional to

W
(A) \( v \)
(B) \( v^{2} \)
(C) \( v^{-1} \)
(D) \( v^{-2} \)
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