A particle of charge $Q$ and mass $m$ travels through a potential difference $V$ from rest. The final momentum of the particle is
A particle of charge $Q$ and mass $m$ travels through a potential difference $V$ from rest. The final momentum of the particle is
- A
$\frac{{mV}}{Q}$
- B
$2Q\sqrt {mV} $
- C
$\sqrt {2mQV} $
- D
$\sqrt {\frac{{2QV}}{m}} $
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