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A charged particle of mass 4gm and havin...

A charged particle of mass `4gm` and having a charge `+1 mu C` is fired from a point with speed `10m/s` ,where electric potential is `4times10^(5)V`in the direction,where electric potential is decreasing,find the potential at a point (in volts) where its speed becomes `10sqrt(2)m/s` .Express your answer in multiple of `10^(5)` .

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