A) \[2qV/m\]
B) \[\sqrt{2qm/V}\]
C) \[\sqrt{m/2qV}\]
D) \[\sqrt{2qV/m}\]
Correct Answer: D
Solution :
: Energy of the particle\[=qV\] Kinetic energy of the particle\[=\frac{1}{2}m{{v}^{2}}\] \[\therefore \]\[\frac{1}{2}m{{v}^{2}}=qV\]or\[{{v}^{2}}=\frac{2qV}{m}\]or\[v=\sqrt{\frac{2qV}{m}}\]
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