A charged particle of mass \( m \) and charge \( q \) is accelerated through a potential differe...

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A charged particle of mass \( m \) and charge \( q \) is accelerated through a potential difference of \( V \) volts. It enters a region of uniform magnetic field \( B \) which is directed perpendicular to the direction of motion of the particle. The particle will move on a circular path of radius :
(A) \( \sqrt{\frac{V m}{2 q B^{2}}} \)
(B) \( \frac{2 \mathrm{Vm}}{q B^{2}} \)
(C) \( \sqrt{\frac{2 V m}{q}}\left(\frac{1}{B}\right) \)
(D) \( \sqrt{\frac{V m}{q}}\left(\frac{1}{B}\right) \)
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